Kim wants to determine a 80 percentconfidence interval for the true proportion p of highschool students in the area who attend their homebasketball games. Out of n randomly selectedstudents she finds that that exactly half attendtheir home basketball games. About how largewould n have to be to get a margin of error lessthan 0.04 for p?n ≈

Answered: Kim wants to determine a 80 percent…

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...

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Dylan wants to determine a 99 percent confidence interval for the true proportion p of high school students in the area who attend their home basketball games. Out of n randomly selected students he finds that that exactly half attend their home basketball games. About how large would n have to be to get a margin of error less than 0.02 for p?
Which of the following would result in the narrower confidence interval? a. A sample size of 100 with 95% confidence b. A sample size of 100 with 99% confidence.
Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years old. How large a sample size must be taken to make an estimate of the true proportion of citizens who favor this move? The error should be no more than 0.01 with 99% confidence. Select one: a. 16641 b. 167 c. 1670 d. 6450 e. 65
For a sampling distribution of n = 800 and population proportion of 0.42 of those who prefercookies for dessert. Find the 90% confidence interval.
For a sampling distribution of n = 500 and population proportion of 0.48 of those who prefercookies for dessert. Find the 95% confidence interval
If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p.Give your answers to three decimals < p <
Dylan wants to determine a 99 percent confidence interval for the true proportion p of high school students in the area who attend their home basketball games. Out of n randomly selected students he finds that that exactly half attend their home basketball games. About how large would n have to be to get a margin of error less than 0.04 for p?
Assume that a sample is used to estimate a population proportion p. To find the 95% confidence interval for a sample of size 250 with 140 successes, you need to use which one the following calculator
Out of 600 people sampled, 240 have shopped online. Based on this, construct a 90% confidence interval for the true population proportion of people who have shopped online.Give your answers as decimals, to three places
Suppose we want a 99% confidence interval for the average amount spent on books by freshmen in their first year at college. The amount spent has a normal distribution with standard deviation $31. How large should the sample be if the margin of error is to be less than $3?
Construct a 90% confidence interval for the mean when x̅=50 and there are 31 observations. Suppose σ=7. What is the confidence interval?
A national survey of 2500adult citizens of a nation found that 25%dreaded Valentine's Day. The margin of error for the survey was 4.6percentage points with 85% confidence. Explain what this means. Which statement below is the best explanation? A. There is 85% confidence that 25% of the adult citizens of the nation dreaded Valentine's Day. B. In 85% of samples of adult citizens of the nation, the proportion that dreaded Valentine's Day is between 0.204 and 0.296. C. There is 85% confidence that the proportion of the adult citizens of the nation that dreaded Valentine's Day is between 0.204 and 0.296. D. There is 80.4% to 89.6% confidence that 25% of the adult citizens of the nation dreaded Valentine's Day.

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