You will be conducting a telephone survey of university students who are 21 years of age or older. You have determined that a sample size of 250 will allow reasonable precision and confidence for your estimates of important population parameters. Let’s assume that 15% of the telephone numbers aren’t working, 2% of students you contact are ineligible because they have working telephone numbers but have left the school, about 20% of students will refuse to participate, and you will be unable to reach 30% of those selected for the sample. How many sampling elements should you include in the project?

You will be conducting a telephone survey of university students who are 21 years of age or older. You have determined that a sample size of 250 will allow reasonable precision and confidence for your estimates of important population parameters. Let’s assume that 15% of the telephone numbers aren’t working, 2% of students you contact are ineligible because they have working telephone numbers but have left the school, about 20% of students will refuse to participate, and you will be unable to reach 30% of those selected for the sample. How many sampling elements should you include in the project?

Name: You will be conducting a telephone survey of university students who a
Uploaded: 2024-03-20T07:07:00.000Z
Channel: Bartleby
Description: You will be conducting a telephone survey of university students who are 21 years of age or older. You have determined that a sample size of 250 will allow reasonable precision and confidence for your estimates of important population parameters. Let

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Related questions

Q: Find the critical value for the population mean if there are 756 cats in a sample and you want a 91%…

Q: What sample size should be obtained if he wants to be within 4 percentage points with 95%…

A: Given that the margin of error is 4 percentage points. That is, ME=4%=0.04 Confidence level =95% The…

Q: Suppose you wish to determine the proportion of college students in NC who receive some form of…

A: Givenconfidence level=95%Margin of error(E)=0.04sample proportion(p^)=0.78

Q: A political candidate has asked his/her assistant to conduct a poll to determine the percentage of…

A: Given E=0.04 Alpha=0.05

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given data, P1 = 21.9% = 0.219 P2 = 14.4% = 0.144 E = 2% = 0.02 Z= value at 95% confidence is Zc =…

Q: You work for NASA and are interested in determining the population proportion, with 99% confidence,…

Q: Suppose Diana, an educational researcher at a local university, wants to test the impact of a new…

A: Diana selects a simple random sample of 68 freshmen and divides them into 34 pairs. we have given,…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

Q: estimate how many people you would need to survey in order to estimate the percentage in your…

A: here given , Suppose you want to estimate the percentage of employees who want to work from home.…

Q: A researcher wants to estimate the proportion of electric car owners in Los Angeles County. The…

A: According to the given information, we havePopulation proportion, p = 10% = 0.10Margin of error, E =…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Given Information: Confidence level = 80% Error (e) = 0.05 Proportion (p) = 0.5 (assumed) The z…

Q: Suppose a cable network wants to determine the current percentage of customers who are under the age…

A: GivenMargin of error(E)=3%=0.03confidence level=90%

Q: According to the American Cancer Society, in 2016 10.7% of the U.S. working population commute to…

A: From the provided information, In 2016, 10.7% of the U.S. working population commute to work by…

Q: Let's say we collect a sample of 500 individuals from a community in Reno and find that 20 of them…

A: Test statistic formula for testing one sample proportion is, z=p^-pp1-pn =p^-pSEp In the given…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: c = 95% E = 2% = 0.02 p^1=0.215p^2=0.195

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: magine that you conduct a study and estimate that the prevalence of hypertension among employees of…

A: It is given that the estimated prevalence is 24%.

Q: There are several sections of statistics, some in the morning (AM) and some in the afternoon (PM).…

A: The formula of test statistic is,

Q: How large a sample is necessary to estimate the true proportion of unmarried Canadians aged 25-29…

A: Given data: Margin of error = 5% = 0.05 Confidence level = 0.90 To find: Sample size (n) = ?

Q: Suppose you wish to determine the proportion of college students in your state who receive some form…

Q: 1)The records for all trains scheduled to depart from the opera house train station last year showed…

A: In given questionConcept Used: Population: Population is a characteristic of the specified area or…

Q: Suppose you have been asked to analyze a data set, and you are planning to use a particular…

A: The complete explanation is in step 2

Q: We want to estimate the number of female chicks in a big aviculture via sampling. How many chicks…

A: To estimate the number of female chicks with a specified margin of error and confidence level, we…

Q: 3) In 2005, 21% of Americans reported that they smoked cigarettes. In a recent study to see if the…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: The formula for margin of error is given as follows: E=zα/2p11-p1n+p21-p2n

Q: You are working on a political campaign and you want to take a sample to determine your candidate’s…

A: From the given information , determine the sample size using margin of error with 95% of confidence…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

Q: It is believed that 11% of all Americans are left-handed. A college needs to know how many…

Q: A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative…

A: From the given information, she wants to use a 2003 estimate of 55% obtained from a Gallup Youth…

Q: Suppose you want to test the claim that a population mean equals 38. State the null hypothesis.

A: Given that, Claim: population mean equals 38.

Concept explainers

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

Topic Video

Question

How many sampling elements should you include in the project?

Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Hypothesis Tests and Confidence Intervals for Proportions$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, probability and related others by exploring similar questions and additional content below.

Similar questions

New medical techniques continue to be developed and compared to standard medical techniques. Suppose you are an analyst and you need to decide if a new medical technique results in a shorter hospital stay than the standard technique. The standard medical technique has an average hospital stay of 3.5 days. Each of you have been assigned example sample information regarding length of hospital stay regarding the new medical technique listed in the following table. You need to use the sample information to determine if the new technique is better than the standard technique with regard to the length of hospital stay (Hint: Shorter hospital stay is better). You need to use results of statistical analysis (hypothesis testing, confidence intervals) to explain, in context, your decision regarding if the new medical technique is better than the standard medical technique. You will need to decide on a significance level for a hypothesis test and a confidence level for the confidence…
Now, let's imagine the poll that found that 52% of U.S. adults believe that the federal government has too much power. And let's say the poll was conducted via telephone interviews among 1010 U.S. adults and contained a margin of error of 2 percentage points at the 95% confidence level. Question 5 Use the information above to create an interval estimate for the proportion of all U.S. adults who believe that the federal government has too much power. %, I don't know %) You answered 4 out of 4 correctly. Asking up to 5. Last attempt
‘In 1996, 31% of students reported that their mothers had graduated college. In 2000, the percentage grew to 32%. The sample size used for both reports was 8368 students. What is the p-value?’
Nearly one-half of Americans ages 25 to 29 are unmarried. How large a sample is necessary to estimate the true proportion of unmarried Americans in this age group within 2 percentage points with 95% confidence?
A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if she wishes the estimate to be within five percentage points with 95% confidence, assuming that (a) she uses the estimates of 22.9% male and 19.5% female from a previous year? (b) she does not use any prior estimates?
When it comes to estimating population parameters from sample statistics, how does the degree of freedom relate to the reliability (or uncertainty) of our calculation? For instance, what would happen to our estimate in relation to the true parameter if we used too many or too few degrees of freedom?
A television sports commentator wants to estimate the proportion of citizens who follow professional football. What sample size should be obtained if he wants to be within 4 percentage points with 96% confidence, if he uses an estimate of 54% obtained from a poll? What sample size should be obtained if he wants to be within 4 percentage points with 96% confidence if he does not use any prior estimates? Why are the results so close?
A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 3% margin of error at a 99% confidence level, what is the minimum sample size needed for the study?Give your answer as a whole number.
What is the approximate sample size required to estimate the percentage of Americans who have earned a college degree to within 2%, with 95% confidence?
On average, a sample of n = 36 scores will provide a better estimate of the population mean than a sample of n = 49 scores from the same population.
Suppose I want to sample the household incomes for EBR parish. Let's say I start with a simple random sample of 100 residents and calculate the sample mean. How would the sampling distribution of change if I increase the sample size to 1,000 residents?
Please don't provide handwriting solution