## Solutions for Understandable Statistics: Concepts and Methods

Problem 1P:

Statistical Literacy In a statistical study what is the difference between an individual and a...Problem 2P:

Statistical Literacy Are data at the nominal level of measurement quantitative or qualitative?Problem 4P:

Statistical Literacy For a set population, does a parameter ever change? If there are three...Problem 5P:

Critical Thinking Numbers are often assigned to data that are categorical in nature. (a) Consider...Problem 6P:

Interpretation Lucy conducted a survey asking some of her friends to specify their favorite type of...Problem 7P:

Marketing: Fast Food A national survey asked 1261 U.S. adult fast-food customers which meal...Problem 8P:

Advertising: Auto Mileage What is the average miles per gallon (mpg) for all new hybrid small cars?...Problem 9P:

Ecology: Wetlands Government agencies carefully monitor water quality and its effect on wetlands...Problem 10P:

Archaeology: Ireland The archaeological site of Tara is more than 4000 years old. Tradition states...Problem 11P:

Student Life: Levels of Measurement Categorize these measurements associated with student life...Problem 12P:

Business: Levels of Measurement Categorize these measurements associated with a robotics company...Problem 13P:

Fishing: Levels of Measurement Categorize these measurements associated with fishing according to...# Browse All Chapters of This Textbook

Chapter 1 - Getting StartedChapter 1.1 - What Is StatisticsChapter 1.2 - Random SamplesChapter 1.3 - Introduction To Experimental DesignChapter 2 - Organizing DataChapter 2.1 - Frequency Distributions, Histograms, And Related TopicsChapter 2.2 - Bar Graphs, Circle Graphs, And Time-series GraphsChapter 2.3 - Stem-and-leaf DisplaysChapter 3 - Averages And VariationChapter 3.1 - Measures Of Central Tendency: Mode, Median, And Mean

Chapter 3.2 - Measures Of VariationChapter 3.3 - Percentiles And Box-and-whisker PlotsChapter 4 - Elementary Probability TheoryChapter 4.1 - What Is Probability?Chapter 4.2 - Some Probability Rules—compound EventsChapter 4.3 - Trees And Counting TechniquesChapter 5 - The Binomial Probability Distribution And Related TopicsChapter 5.1 - Introduction To Random Variables And Probability DistributionsChapter 5.2 - Binomial ProbabilitiesChapter 5.3 - Additional Properties Of The Binomial DistributionChapter 5.4 - The Geometric And Poisson Probability DistributionsChapter 6 - Normal Curves And Sampling DistributionsChapter 6.1 - Graphs Of Normal Probability DistributionsChapter 6.2 - Standard Units And Areas Under The Standard Normal DistributionChapter 6.3 - Areas Under Any Normal CurveChapter 6.4 - Sampling DistributionsChapter 6.5 - The Central Limit TheoremChapter 6.6 - Normal Approximation To Binomial Distribution And To Pˆ DistributionChapter 7 - EstimationChapter 7.1 - Estimating M When S Is KnownChapter 7.2 - Estimating M When S Is UnknownChapter 7.3 - Estimating P In The Binomial DistributionChapter 7.4 - Estimating M1 - M2 And P1 - P2Chapter 8 - Hypothesis TestingChapter 8.1 - Introduction To Statistical TestsChapter 8.2 - Testing The Mean MChapter 8.3 - Testing A Proportion PChapter 8.4 - Tests Involving Paired Differences (dependent Samples)Chapter 8.5 - Testing M1 - M2 And P1 - P2 (independent Samples)Chapter 9 - Correlation And RegressionChapter 9.1 - Scatter Diagrams And Linear CorrelationChapter 9.2 - Linear Regression And The Coefficient Of DeterminationChapter 9.3 - Inferences For Correlation And RegressionChapter 9.4 - Multiple RegressionChapter 10 - Chi-square And F DistributionsChapter 10.1 - Overview Of The Chi-square DistributionChapter 10.2 - Chi-square: Tests Of Independence And Of HomogeneityChapter 10.3 - Chi-square: Goodness Of FitChapter 10.4 - Testing And Estimating A Single Variance Or Standard DeviationChapter 10.5 - Testing Two VariancesChapter 10.6 - One-way Anova: Comparing Several Sample MeansChapter 11 - Nonparametric StatisticsChapter 11.1 - The Sign Test For Matched PairsChapter 11.2 - The Rank-sum TestChapter 11.3 - Spearman Rank CorrelationChapter 11.4 - Runs Test For Randomness

# Sample Solutions for this Textbook

We offer sample solutions for Understandable Statistics: Concepts and Methods homework problems. See examples below:

Chapter 1, Problem 1CRPCalculation: From the given data set, the largest data point is 200 and the smallest data point is...Calculation: From the given data set, the largest data point is 43 and the smallest data point is 0....Qualitative data: Qualitative data are non-numerical or categorical data that cannot be measured...Calculation: Class limits: Class limits are the maximum and minimum values in the class interval...Calculation: Class limits: Class limits are the maximum and minimum values in the class interval....The range is obtained below: Range=Largest value−Smallest value=30−15=15 Thus, the range is 15.Step-by-step procedure to verify ∑x and ∑x2 using a Ti83 calculator is as given below: Press STAT....Step-by-step procedure to verify ∑x and ∑x2 using Ti83 calculator is given below: Press STAT. Select...

The measures of variation describe the spread of the data. The standard deviation and variance is...Chapter 3, Problem 5CRPThe important source of water for wildlife, rancher, farmers, and cities downstream is Yellowstone...Chapter 3, Problem 10CRPChapter 4.1, Problem 22PIt is given that two fair dice are rolled, then the sample space is n(s)=62. That is, the following...It is given that two fair dice are rolled, then the sample space is n(s)=62. That is, the following...It is given that the events A, Pa, S, and N are defined as follows: A=Aggressive approach,...Chapter 4.2, Problem 32PLet A be the event that a client has relapse in phase I and B be the event that a client has relapse...It is given that two events for an individual are defined as follows: A=owns a cell phone and B=owns...It is given that the events W, A, S, M and N are defined as follows: W=washing oil off within 5...Calculation: Let W be the random variable defined as the difference between the scores W= x1−x2 with...Calculation: Let W be the random variable defined as the total time to examine and repair the...Calculation: A trial determines the sex of a wolf with two possible outcomes, success or failure....Calculation: Trial: A trial is gross receipt of store for one business day with two possible...Calculation: Trial: The trial is considered as visiting to office. Success: Consider success as...Chapter 5.3, Problem 11PCalculation: Let r follows a binomial distribution that represents the number of professors who are...Calculation: Let n follows a negative binomial distribution that represents the number of years in...Calculation: There are binomial trials with probability of success p=0.80 and failure as q=0.20. Let...Calculation: There are binomial trials with probability of success p=0.41 and failure as q=0.59. Let...The probabilities are assigned to each of the possible values of discrete random variables, whereas...Geometric distribution: There should be n independent trials. Each trial has two outcomes. The...The number of adult who agrees that humanity should explore the planet follows a binomial...Calculation: Z score: The number of standard deviations the original measurement x is from the value...Calculation: Z score: The number of standard deviations the original measurement x is from the value...Calculation: Rule of Thumb: The formula for standard deviation using range is, σ=Range4 In the...Calculation: Rule of Thumb: The formula for standard deviation using range is, σ=Range4 In the...Calculation: Z score: The number of standard deviations the original measurement x is from the value...Calculation: Z score: The number of standard deviations the original measurement x is from the value...Calculation: Z score: The number of standard deviations the original measurement x is from the value...Calculation: Central limit theorem: The characteristics of the sampling distribution x¯, for all the...Calculation: Conditions for normal approximation to the binomial: For a binomial experiment with n...Chapter 6.6, Problem 14PNormal probability distribution: The normal probability distribution is a continuous distribution....Calculation: Conditions for normal approximation to the binomial: For a binomial experiment with n...Calculation: Conditions for normal approximation to the binomial: For a binomial experiment with n...Chapter 6, Problem 1DHCalculation: From table A, the Magnetic Susceptibility intervals and corresponding probabilities...Here, x¯=138.5, σ=42.6, n=30, and α=0.1. From Table 5: Areas of a Standard Normal Distribution, the...Step-by-step procedure to obtain the average using Ti-83 calculator: Click on Stat. From EDIT,...Calculation: Let variable x denotes crime rates. Mean: Use Ti 83 calculator tofind the mean as...Calculation: For confidence level 90%: Use Ti 83 calculator tofind the confidence interval as...Calculation: Point estimate: The point estimate for p is, p^=rn In the formula n is the number of...Calculation: Confidence interval: The confidence interval formula is, p˜−E<p<p˜+E In the...Requirements: When the distribution of x1 (population 1) and x2 (population 2) has the normal...Requirements: When the distribution of x1 (population 1) and x2 (population 2) has the normal...Confidence interval: The confidence interval for μ1−μ2 when both σ1 and σ2 are unknown is,...Point estimate: The estimate of the parameter value based on single number is referred as point...Calculation: The μ1 is the population mean for soil water content from field I and μ2 is the...Calculation: Let x represent the lengths of little neck clams and y represent the widths of little...Calculation: Let μ denotes the average wheat hail damage. From the given information the value of α...Calculation: Let μ denotes the Roger’s average red blood cell volume. From the given information the...Calculation: Let variable x denotes life span in Honolulu. Mean: Use Ti 83 calculator to find the...Calculation: Let x denotes tree-ring dates in this excavation area. Mean: Use Ti 83 calculator to...Calculation: (a) Let p denotes the population proportion of all numbers in the corporate file that...Calculation: (a) Let p denotes the population proportion of all numbers in the computer file that...Calculation: Conditions: When the d distribution considered in the study has the normal distribution...Calculation: Let μd denotes the population mean of the differences. From the given information the...Calculation: The pooled best estimate for the population probabilities of success is, p¯=r1+r2n1+n2...Calculation: The pooled best estimate for the population probabilities of success is, p¯=r1+r2n1+n2...Calculation: Let p1 denotes the population proportion of women who favor spending more federal tax...If the population x distribution is normal with known population standard deviation (σ) or if sample...Calculation: Let μ1 denotes the average off-schedule time of bus line A, μ2 denotes the average...Calculation: Let p1 denotes the population proportion of urban residents subscribe to Sporting News,...Calculation: The variable x denotes lowest pressure (in millibars) as a cyclone approaches and...Calculation: The formula for correlation coefficient is, r=n∑xy−(∑x)(∑y)n∑x2−(∑x)2n∑y2−(∑y)2 In the...Calculation: The variable x denotes the weight of the car (in hundreds of pounds) and y denotes the...Calculation: The variable x denotes the age of a licensed driver in years and y denotes the...Calculation: The variable x denotes a random variable that represents the percentage of successful...If the value of correlation coefficient is near 0 then there is no relationship between the two...Calculation: The variable x denotes the number of job changes and y denotes the annual salary for...Calculation: The variable x denotes the weight of incoming mail and y denotes the number of...Calculation: From the given information the value of α is 0.05, and to test the occupations and...Calculation: From the given information the probability distribution of r is, P(r)=e−λλrr! Where,...Calculation: Let σ2 denotes the variance in the new section, the variable x denotes the number of...Calculation: Sample variance for first plot: Use Ti 83 calculator to find the variance as follows:...The z distribution and t distribution are symmetric distributions which are normal. The symmetric...Calculation: (i) A study is conducted by consumer agency for determining the blowout pressures of...Chi-square test of independence: A single simple random sampling is done with each individual being...Calculation: From the given information the value of α is 0.01, and the information indicate that...Calculation: From the given information the value of α is 0.01, and to test the claim that there is...Calculation: Let variable x denotes the abuse, and y denotes the runaways. Procedure for assigned...Calculation: From the given information the value of α is 0.05, and to test the sequence for...The non-parametric test does not assume anything concerning about the distributions of population....The rank-sum test is the nonparametric test which is used when the data is independent. It is used...

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