Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval for a sample of size 242 with 11% successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. C.I. =

Question
Asked Nov 21, 2019
25 views

Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval for a sample of size 242 with 11% successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places.

 

C.I. =

check_circle

Expert Answer

Step 1

The sample proportion is 0.11.

The sample size is 242.

Consider the confidence interval as 80%, the two-tailed z value at 0.20 level of s...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Math

Statistics

Other

Related Statistics Q&A

Find answers to questions asked by student like you
question_answer

Q: Suppose that the insurance companies did do a survey. They randomly surveyed 400 drivers and found t...

A: Confidence interval:The (1-α) % confidence interval for proportion p is given by,

question_answer

Q: Suppose that 14 children, who were learning to ride two-wheel bikes, were surveyed to determine how ...

A: The provided information are:

question_answer

Q: An engineer has designed a valve that will regulate water pressure on an automobile engine. The valv...

A: In this case, the test is to check whether the valve performs below the specifications or not. Here,...

question_answer

Q: Do Pinterest shoppers and Facebook shoppers differ with respect to spending behavior? A study of bro...

A: 1. The claim of the problem is testing whether there  is any evidence of a difference in the varianc...

question_answer

Q: Practice question 10

A: The concepts of least square regression line and regression equation are used to solve the problem. ...

question_answer

Q: 3. The following table shows the percentage of individuals in each age group who use an online tax p...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

question_answer

Q: A security code consists of a person's first and last initials followed by four digits. What is the ...

A: The probability of an event is defined as 

question_answer

Q: You are performing a right-tailed test. If a .002, find the critical value, to three decimal places....

A: It is given that the significance level is 0.002 and tail of the test is right tail.The critical val...

question_answer

Q: which two scales of measurements always require nonparametric procedures?

A: Non-parametric tests are used when assumptions of parametric tests are not met, or the data does not...

question_answer

Q: number 7

A: a.The formula for mean and standard deviation is given by:

question_answer

Q: The amount of coffee that people drink per day is normally distributed with a mean of 16 ounces and ...

A: From the given information, mean (μ) = 16 ounces and standard deviation (σ) = 4 ounces.And also samp...

question_answer

Q: You read in a U.S. Census Bureau report that a 90% confidence interval for the median income in 2012...

A: It is given that 90% confidence interval for the median income in 2012 of American households was $5...

question_answer

Q: Suppose that the duration of a particular type of criminal trial is known to be normally distributed...

A: From the given information, mean (μ) =16 days and standard deviation (σ) =4days(a)Given data normall...

question_answer

Q: The table below shows the number of state-registered automatic weapons and the murder rate for sever...

A: Given modeled equationy^ =   0.85 x + 4.05y = murders per 100000 residentsx = thousands of automatic...

question_answer

Q: Note: Please explain your answers to all questions, what's the sample space? How do you calculate th...

A: Hello! As you have posted 3 different questions, we are answering the first question. In case you re...

question_answer

Q: Age  Incident CVD No CVD Total < 50 45 555 600 50+ 61 339 400 Total 106 894 1000 Is age ...

A: Given data table in the this question is,Age Incident CVDNo CVDTotal< 504555560050+61339400Total1...

question_answer

Q: The lengths of adult males' hands are normally distributed with mean 187 mm and standard deviation i...

A: Standard normal distribution:The standard normal distribution is a special case of normal distributi...

question_answer

Q: The average price of a college math textbook is $160 and the standard deviation is $26. Suppose that...

A: Standard normal distribution:The standard normal distribution is a special case of normal distributi...

question_answer

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 70 mph and ...

A: Standard normal distribution:The standard normal distribution is a special case of normal distributi...

question_answer

Q: For Confidence interval problems: 1. Mention the name of the interval (for example Z interval or t i...

A: 1. The t interval is used for constructing the confidence interval for the given data. 2. Assumption...

question_answer

Q: Over the past few decades, public health officials have examined the link between weight concerns an...

A: Hypothesis testing is used mainly to check whether an assumption made on the population is statistic...

question_answer

Q: Suppose that the number of Facebook friends users have is normally distributed with a mean of 142 an...

A: Note:Hey there! Thank you for the question. As your question has more than 3 parts, according to our...

question_answer

Q: when can a normal distribution be used to approximate a binomial distribution?

A: Introduction to binomial distribution:Consider a random experiment involving n independent trials, s...

question_answer

Q: 38      36 36      34 34      28 28      17 17      16 16      13 13      9 9      8.6 8.6      8.1 ...

A: See the given sample data set provided in the question, the maximum value is 38 and minimum value is...

question_answer

Q: 13. Finally (and this is the tough one), how would your results have differed with regard to steps 4...

A: Hello there! there are more than three subparts in the question. According to our policies we cannot...

question_answer

Q: SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested ...

A: Introduction:The 100 (1 – α) % confidence interval for the population mean, μ, for given population ...

question_answer

Q: A sample of 16 small bags of the same brand of candies was selected. Assume that the population dist...

A: Given information is below,Sample size (n) = 16,Mean (μ) = 2 ounces,Population standard deviation (σ...

question_answer

Q: I have attached a picture of the question. Please answer section A, B , and C.

A: Click to see the answer

question_answer

Q: If x represents a random variable with mean 125 and standard deviation 36, then the standard deviati...

A: For a random sample of 81, X –bar follows normal with mean value of 125 and standard deviation of 4....

question_answer

Q: A crossover trial is a type of experiment used to compare two drugs. Subjects take one drug for a pe...

A: The provided table can be tabulated as:

question_answer

Q: A recent national survey found that high school students watched an average (mean) of 7.0 movies per...

A: 1.Null and alternative hypotheses:Null hypothesis:H0: µ = 7.0.That is, the average movies watched by...

question_answer

Q: Find the a=0.05 critical value for the chi-square statistic with 14 degrees of freedom.

A: Given level of significance = 0.05And df (degree of freedom) = 14

question_answer

Q: Can you do problem 2? Answers a, b, c, d, e

A: We are authorized to answer three subparts at a time, so we are answering the first three subparts, ...

question_answer

Q: A study using two random samples found that the mean amount of time spent per week on leisure activi...

A: Given information:Significance level = 0.05

question_answer

Q: 11.11 The following table lists the frequency distribution for 60 rolls of a die Outcome 1-spot 2-sp...

A: Null hypothesis (H0): The die is fairAlternative hypothesis (H1): The die is not fair.Level of signi...

question_answer

Q: After we have conducted a hypothesis test, what are two ways we could measure the effect size of the...

A: Hypothesis testing:Hypothesis testing was introduced by R.A.Fisher (Ronald Fisher).It is a statistic...

question_answer

Q: 95% confidence interval Are middle class families more likely than working class families to maintai...

A: a)Given data

question_answer

Q: If the sample size is 30 for each group, there are 3 groups, and the mean score for football players...

A: Given data SSbetween = 60SSwithin = 105dfbetween = 3 dfwithin = 60α = 0.05Critical value of F is giv...

question_answer

Q: To determine whether caffeine consumption affectsthe ability to solve math problems, a researcher ha...

A: According to the provided question, a study was conducted to test the caffeine consumption affects t...

question_answer

Q: The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget...

A: It is given that the widget weights follows normal distribution with mean of 46 and standard deviati...

question_answer

Q: The mean amount of time it takes a kidney stone to pass is 16 days and the standard deviation is 5 d...

A: Standard normal distribution:The standard normal distribution is a special case of normal distributi...

question_answer

Q: The nutrition lab in Chapter 17, Exercise 38 tested 40 hot dogs to see if their mean sodium content ...

A: a.From the provided information, the sample size of hot dogs (n) = 40Let µ represents the population...

question_answer

Q: What is a  relevant to hypothesis testing in your daily life? This could be school life, personal li...

A: Hypothesis:Hypothesis is an assumption about the parameter of the population which will be made on t...

question_answer

Q: Use the given data to find the equation of the regression line. Round the final values to three sign...

A: Regression:In order to obtain the least square regression line, first perform regression analysis on...

question_answer

Q: A die has two of its sides painted green. It is rolled four times. What is the probability of gettin...

A: The probability mass function of binomial distribution is given below:

question_answer

Q: The following table shows the results of a two-factor analysis of variance with 2 levels of factor A...

A: Total number of observations = 3×2×5 = 30.Total degrees of freedom = 30-1 = 29.There are two levels ...

question_answer

Q: Please look at the work I've done. Is it correct? Can you help walk me through how to finish it? Tha...

A: The provided table can be tabulated as:

question_answer

Q: nequals=75 Suppose a simple random sample of size is obtained from a population whose size is Upper ...

A: It is given that n is 75, N is 15,000 and p is 0.4.

question_answer

Q: waold be 147, 21 Econ omists predict price Std dev. far there prices 9,25 th presictn te Tanple t fr...

A: The hypotheses for the test is given below.Null hypothesis:H0: µ = 147.21Alternative hypothesis:H1: ...

question_answer

Q: depression anxiety email overload cognitive failure perfectionism 1.75 1.4 2 2.4 1.6 2.25 2.4 3....

A: Correlation calculation:We have solved part of this problem using Excel.Enter the 5 columns of the d...