## Solutions for Essential Statistics

Problem 1CYU:

1. A pollster wants to estimate the proportion of voters in a certain town who are Democrats. He...Problem 3CYU:

3. A radio talk-show host invites listeners to send an email to express their opinions on an...Problem 4CYU:

4. Every 10 years, the U.S. Census Bureau attempts to count every person living in the United...Problem 5CYU:

5. A public health researcher is designing a study of the effect of diet on heart disease. The...Problem 6CYU:

6. A college basketball team held a promotion at one of its games in which every twentieth person...Problem 8E:

In Exercises 7–12, fill in each blank with the appropriate word or phrase.
8. A ________ is a subset...Problem 9E:

In Exercises 7–12, fill in each blank with the appropriate word or phrase.
9. A _________ is a type...Problem 10E:

In Exercises 7–12, fill in each blank with the appropriate word or phrase.
10. A sample that is not...Problem 11E:

In Exercises 7–12, fill in each blank with the appropriate word or phrase.
11. A _________ sample is...Problem 12E:

In Exercises 7–12, fill in each blank with the appropriate word or phrase.
12. A _______ sample is...Problem 13E:

In Exercises 13–16, determine whether the statement is true or false. If the statement is false,...Problem 14E:

In Exercises 13–16, determine whether the statement is true or false. If the statement is false,...Problem 15E:

In Exercises 13–16, determine whether the statement is true or false. If the statement is false,...Problem 16E:

In Exercises 13–16, determine whether the statement is true or false. If the statement is false,...Problem 18E:

In Exercises 17–20, determine whether the number described is a statistic or a parameter.
18. The...Problem 20E:

In Exercises 17–20, determine whether the number described is a statistic or a parameter.
20. In a...Problem 26E:

In Exercises 25–36, identify the kind of sample that is described.
26. Cruising the mall: A pollster...Problem 27E:

In Exercises 25–36, identify the kind of sample that is described.
27. What’s on TV? A pollster...Problem 28E:

In Exercises 25–36, identify the kind of sample that is described.
28. Don’t drink and drive: Police...Problem 29E:

In Exercises 25–36, identify the kind of sample that is described.
29. Tell us your opinion: A...Problem 30E:

In Exercises 25–36, identify the kind of sample that is described.
30. Reading program: The...Problem 31E:

In Exercises 25–36, identify the kind of sample that is described.
31. Customer survey: All the...Problem 32E:

In Exercises 25–36, identify the kind of sample that is described.
32. Raffle: Five hundred people...Problem 33E:

In Exercises 25–36, identify the kind of sample that is described.
33. Hospital survey: The director...Problem 34E:

In Exercises 25–36, identify the kind of sample that is described.
34. Bus schedule: Officials at a...Problem 35E:

In Exercises 25–36, identify the kind of sample that is described.
35. How much did you spend? A...Problem 36E:

In Exercises 25–36, identify the kind of sample that is described.
36. Phone features: A cell phone...Problem 37E:

In Exercises 25–36, identify the kind of sample that is described.
37. Computer network: Every third...Problem 38E:

In Exercises 25–36, identify the kind of sample that is described.
38. Smartphone apps: A smartphone...Problem 39E:

39. You’re giving me a headache: A pharmaceutical company wants to test a new drug that is designed...Problem 40E:

40. Pay more for recreation? The director of the recreation center at a large university wants to...Problem 42E:

42. Quality control: Products come off an assembly line at the rate of several hundred per hour. It...Problem 43E:

43. On-site day care: A large company wants to sample 200 employees to ask their opinions about...# Browse All Chapters of This Textbook

Chapter 1 - Basic IdeasChapter 1.1 - SamplingChapter 1.2 - Types Of DataChapter 1.3 - Design Of ExperimentsChapter 1.4 - Bias In StudiesChapter 2 - Graphical Summaries Of DataChapter 2.1 - Graphical Summaries For Qualitative DataChapter 2.2 - Frequency Distributions And Their GraphsChapter 2.3 - More Graphs For Quantitative DataChapter 2.4 - Graphs Can Be Misleading

Chapter 3 - Numerical Summaries Of DataChapter 3.1 - Measures Of CenterChapter 3.2 - Measures Of SpreadChapter 3.3 - Measures Of PositionChapter 4 - ProbabilityChapter 4.1 - Basic Concepts Of ProbabilityChapter 4.2 - The Addition Rule And The Rule Of ComplementsChapter 4.3 - Conditional Probability And The Multiplication RuleChapter 4.4 - CountingChapter 5 - Discrete Probability DistributionsChapter 5.1 - Random VariablesChapter 5.2 - The Binomial DistributionChapter 6 - The Normal DistributionChapter 6.1 - The Normal CurveChapter 6.2 - Sampling Distributions And The Central Limit TheoremChapter 6.3 - The Central Limit Theorem For ProportionsChapter 6.4 - The Normal Approximation To The Binomial DistributionChapter 6.5 - Assessing NormalityChapter 7 - Confidence IntervalsChapter 7.1 - Confidence Intervals For A Population Mean, Standard Deviation KnownChapter 7.2 - Confidence Intervals For A Population Mean, Standard Deviation UnknownChapter 7.3 - Confidence Intervals For A Population ProportionChapter 7.4 - Determining Which Method To UseChapter 8 - Hypothesis TestingChapter 8.1 - Basic Principles Of Hypothesis TestingChapter 8.2 - Hypothesis Tests For A Population Mean, Standard Deviation KnownChapter 8.3 - Hypothesis Tests For A Population Mean, Standard Deviation UnknownChapter 8.4 - Hypothesis Tests For ProportionsChapter 8.5 - Determining Which Method To UseChapter 9 - Inferences On Two SamplesChapter 9.1 - Inference About The Difference Between Two Means: Independent SamplesChapter 9.2 - Inference About The Difference Between Two ProportionsChapter 9.3 - Inference About The Difference Between Two Means: Paired SamplesChapter 10 - Tests With Qualitative DataChapter 10.1 - Testing Goodness Of FitChapter 10.2 - Tests For Independence And HomogeneityChapter 11 - Correlation And RegressionChapter 11.1 - CorrelationChapter 11.2 - The Least-squares Regression LineChapter 11.3 - Inference On The Slope Of The Regression LineChapter 11.4 - Inference About The Response

### Book Details

Navidi/Monk, Elementary Statistics was developed around three central themes - Clarity, Quality, and Accuracy. These central themes were born out of extensive market research and feedback from statistics instructors across the country. The authors paid close attention to how material is presented to students, ensuring that the content in the text is very clear, concise, and digestible. High quality exercises, examples and integration of technology are important aspects of an introductory statistics text. The authors have provided robust exercise sets that range in difficulty. They have also focused keen attention to ensure that examples provide clear instruction to students. Technology is integrated throughout the text, providing students examples of how to use the TI-84 Plus Graphing Calculators, Microsoft Excel and Minitab. The accuracy of Elementary Statistics was a foundational principle always on the minds of the authors. While this certainly pertains to all aspects of the text, the authors also exhausted energy in ensuring the supplements have been developed to fit cohesively with the text.

# Sample Solutions for this Textbook

We offer sample solutions for Essential Statistics homework problems. See examples below:

Chapter 1, Problem 1CQCalculation: The given information is a table representing the numbers of people in various gender...Calculation: The given information is a table representing the frequency distribution categorizes...Calculation: The given information is a table representing the number of households categorized by...Chapter 2.2, Problem 29EChapter 2.2, Problem 30ECalculation: The given information is that a table representing the number of words spoken in each...Calculation: The given information is that a list of letter grades for students in an algebra class,...The given information is a frequency distribution corresponding to the number of freshmen elected in...

Calculation: The given information is that a data representing the age at which the all English and...Calculation: The given information is that a data representing the age at which the all U.S....Calculation: The ratings for the top 20 prime-time show for 2007-2008 and 2012-2013 seasons are...Calculation: The price of single family homes in United States for the first quarter of 2012 and...Calculation: The closing prices of google stock in May and June are given. Standard deviation: Let...Calculation: The annual percentage returns for the years 1993-2012, for the three categories of...Calculation: The mean birth weight of 621 new born babies is 3,234 grams and the standard deviation...Calculation: If x1,x2...xn be n values, the mean absolute deviation is given by, Mean absolute...Chapter 3.3, Problem 25EChapter 3.3, Problem 26EChapter 3.3, Problem 30EChapter 3.3, Problem 32EChapter 3, Problem 1CQCalculation: The closing prices of google stock in May and June are given. Standard deviation: Let...Chapter 3, Problem 12RECalculation: A data of weights of 50 soap were measured. Three quartiles: The first quartile...Calculation: The profit of 15 largest U.S. Corporation is given. Three quartiles: The first quartile...Two fair dice are rolled. One is red and one is blue. The 36 equally likely outcomes. Sample space:...Calculation: The U.S workers are classified based on type of occupation and education level. The...Two fair die are rolled. First one is red and one is blue. The 36 outcomes in the sample space....Calculation: There were a total of 100 senators. Senators are classified based on party affiliation...Calculation: There were a total of 14,518 reports. The reports are obtained from five Borough. The...Two dies are rolled. Event A denotes that number on the first die is even and B denotes that number...Calculation: There were a total of 600. The restaurants are classified based on city population and...Calculation: There were a total of 600 semiconductor wafers. There are three lots and each of them...Calculation: There were a total of 64.5 million women and 74.6 million men. Among the women 25.8 had...Calculation: There were a total of 1,000 components, 300 of them are defective. Two components are...Chapter 4.4, Problem 36EChapter 4.4, Problem 38EChapter 4.4, Problem 40EChapter 4, Problem 1CQIt is given that three circuits were installed in a computer. There were 12% chances that the...Calculation: It is given that the probability that selected student is a female is 0.55, the...Calculation: It is given that 644,404 patients were hospitalized for heart attack. The table...Calculation: The given information is a life table. The first and second column of the table...Calculation: The table represents the probability distribution of the random variable X, the number...Calculation: The table represents the probability distribution of the random variable X, the number...Calculation: The table represents the probability distribution of the random variable X, the number...Calculation: The table represents the results of the survey in which 1,676 people are asked how many...Calculation: The table represents the numbers of students enrolled in grades 1 through 8 in public...From a large lot, three components are sampled, one at a time. The component is tested at that time...Calculation: It was found that 20% of the gamers have heard of the game “Modern Warfare 2” in the...Calculation: It was found that 66% of the students graduated from high school enrolled in college. A...Calculation: It was found that 25% of the babies weigh more than 20 pounds. A random sample of 16...Calculation: It was found that 30% of the adults have hypertension. A random sample of 25 adults is...The rules for a discrete probability distribution are, The sum of the probabilities must equal to 1....Calculation: The given table represents the frequency distribution of the number of AP tests taken...Calculation: The given data shows that the summer temperature for five days in July. The formula to...Calculation: The given data shows that the summer temperature for five days in July. The formula to...Chapter 6.2, Problem 31EChapter 6.3, Problem 21EChapter 6.3, Problem 22EChapter 6.4, Problem 21ECalculation: The given information is that “when two heterozygous plants are crossed then the plants...Chapter 6, Problem 1CQCalculation: The given information is that the sample size n is 240, population proportion of...Chapter 6, Problem 12RECalculation: The given information is that there is 5% of the rods are defective and the customer...Calculation: Critical value: If α is a number between 0 and 1 or 0<α<1, then The notation zα...Calculation: Critical value: If α is a number between 0 and 1 or 0<α<1, then The notation zα...Chapter 7.1, Problem 65EChapter 7.1, Problem 66ECalculation: The given information is that, the level is 95% and the sample size is 15. Conditions:...Calculation: The given information is that, the level is 95% and the sample size is 23. Conditions:...Calculation: The given information is that, the level is 90% and the sample size is 6. Conditions:...Calculation: The given information is that,in a certain college 9 said that they planned to go to...Calculation: The given information is that,in a certain college 9 said that they planned to go to...Point estimate: It is the single number which is used to estimate the value of an unknown parameter.The researcher interested to check the calibration of the scale by using standard weight of 10 grams...A random sample 60 students attended the series of coaching class and had the mean IQ score of 100....It is given that the value of test statistic z as 1.78 and significance level α=0.05. Denote μ as...Calculation: The output obtained using MINITAB for the hypothesis test of a population mean is...Calculation: The output obtained using MINITAB for the hypothesis test of a population mean is...Calculation: The given test hypotheses are: Null hypothesis: H0:μ=20. Alternate hypothesis:...Calculation: The results of t-test is given. Here, the direction of the test is two-tailed. Null...Calculation: The results of t-test is given. Here, the direction of the test is right-tailed. Null...Calculation: The result of t-test is given. Here, the direction of the test is two-tailed. Null...In a simple random sample of 80 individuals, only 54 individuals are in the group of interest. The...In a simple random sample, of 60 samples, only 38 individuals are in the group of interest. The...In a simple random sample, of 75 samples, only 42 individuals are in the group of interest. The...Denote μ as the true population mean. The given test hypotheses are: Null hypothesis: H0:μ=65....Calculation: In a simple random sample of 500 people who took driving test, only 445 passed the...In a poll, of 200 students, 134 reports that they log in to Facebook daily Denote p as the true...In the survey conducted by the General Social Survey, of 762 employed people, 386 people were...The Pew Research Center conducted the survey among the students at University who watch cable news...Calculation: The given statistics for testing the hypothesis H0:μ1=μ2 versus H1:μ1>μ2 are given...Calculation: The given statistics for testing the hypothesis H0:μ1=μ2 versus H1:μ1≠μ2 are given as...Calculation: It is given that, the statistics regarding the number of hours spent on internet per...Calculation: It is given that, the statistics regarding the weight loss of candidates under...It is given that among a sample of 100 patients under drug-1, 76 patients experienced relief from...It is given that among a sample of 200 voters of age over 60 years, 95 voters supported increase in...It is given that among a sample of 500 chips produced by less expensive machine, 70 chips were...The data represents the reading scores of a sample of 5 third graders before and after the reading...The data represents the mean amount of rainfall of a chosen city in two consecutive years (year2 and...Calculation: The data represents the sample of a five matched pairs. Let μd=μ1−μ2 where μ1 be the...Chapter 9, Problem 1CQCalculation: The data represents the means and standard deviations corresponding to three...Calculation: The data represents the means and standard deviations corresponding to three...Calculation: The data represents the means and standard deviations corresponding to three...Calculation: The data represents the means and standard deviations corresponding to three...Calculation: The observed frequencies of five categories are given. Expected frequencies: The...Calculation: A gambler rolls a die 600 times to find whether the dice is fair or not. The observed...Calculation: The contingency table with 6 rows consisting of six classification of number of...Calculation: The contingency table with 2 rows and 2 columns are given. The two rows consist of...Calculation: The contingency table with 4 rows and 5 columns is given. The chi-square test statistic...Calculation: The observed frequencies for 59 Powerball for a sequence of 755 draws are given....Calculation: The contingency table 10.10 with 2 rows and 6 columns are given. The two rows consist...Calculation: The contingency table 10.11 with 2 rows and 6 columns are given. The two rows consist...Calculation: The six contingency tables with 2 rows and 2 columns for each of the six departments...Calculation: The number of years of service (x) and the hourly wages ($) (y) of the five employees...Calculation: The heights (inches) and weights (pounds) for some quarterbacks at a Combine are given....Calculation: The interest rates for the 30-year fixed-rate mortgages and the 15-year fixed-rate...Calculation: The verbal SAT scores (x) and the math SAT scores (y) of six fishermen are given....Calculation: The given information is that the sample data consists of 6 values for x and y. Slope...Calculation: The given information is that the sample data consists of 8 values for x and y. Slope...Calculation: The given information is that the sample data consists of 7 values for x and y. Slope...Calculation: The given information is that, the sample size is 25 and parameter estimates are given...Calculation: The given information is that the sample data consists of 8 values for x and y. Slope...Interpretation: The ordered paired values of the random variables x and y are given. Correlation:...Calculation: The given information is that the sample data consists of 8 values for x and y. Slope...

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