Internet Viewing A researcher wishes to estimate the average number of minutes per day a person spends on the Internet. How large a sample must she select if she wishes to be 95% confident that the population mean is within 13 minutes of the sample mean? Assume the population standard deviation is 44 minutes. Round your final answer up to the next whole number. The researcher needs a sample of at least ____ people.

Internet Viewing A researcher wishes to estimate the average number of minutes per day a person spends on the Internet. How large a sample must she select if she wishes to be 95% confident that the population mean is within 13 minutes of the sample mean? Assume the population standard deviation is 44 minutes. Round your final answer up to the next whole number. The researcher needs a sample of at least ____ people.

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

Similar questions

Tossing Coins Find the mean, variance, and standard deviation for the number of heads when 11 coins are tossed. Round your answer to three decimal places.
Internet Viewing A researcher wishes to estimate the average number of minutes per day a person spends on the Internet. How large a sample must she select if she wishes to be 95% confident that the population mean is within 9 minutes of the sample mean? Assume the population standard deviation is 47 minutes. Round your final answer up to the next whole number. The researcher needs a sample of at least people.
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately = 60.5. You would like to be 95% confident that your estimate is within 5 of the true population mean. How large of a sample size is required? Round up to nearest whole number. n= Question Help: Video Written Example Message instructor Submit Question Jump to Answer 80 F1 F2 F3 Q A N @ 2 W S #3 X E D $ F4 R or dº % 5 F5 T MacBook Air F6 6 Y & 7 A4 F7 U * 00 8 J DII F8 | ( 9 K F9 0 ) о
Internet Viewing A researcher wishes to estimate the average number of minutes per day a person spends on the Internet. How large a sample must she select if she wishes to be 95% confident that the population mean is within 7 minutes of the sample mean? Assume the population standard deviation is 36 minutes. Round your final answer up to the next whole number. The researcher needs a sample of at least people. ol
The numbers of regular season wins for 10 football teams in a given season are given below. Determine the range, mean, variance, and standard deviation of the population data set. 2, 7, 15, 5, 14, 10, 12, 8, 3, 9 The range is 1313. (Simplify your answer.) The population mean is . (Simplify your answer. Round to the nearest tenth as needed.) The population variance is nothing. (Simplify your answer. Round to the nearest tenth as needed.) The population standard deviation is nothing. (Simplify your answer. Round to the nearest tenth as needed.)
A Gallup poll wants to determine the mean number of books Americans read each year. How many subjects are needed to estimate the average number of books Americans read with a margin of error of 0.58 books with 80% confidence? Initial results of the Gallup poll indicate that the population standard deviation is 5.5 books. Round your answer up to the next integer. Question Help: D Video Submit Question P Type here to search
← The numbers of regular season wins for 10 football teams in a given season are given below. Determine the range, mean, variance, and standard deviation of the population data set. 2, 10, 15, 4, 12, 9, 13, 10, 5, 7 The range is 13. (Simplify your answer.) The population mean is 8.7. (Simplify your answer. Round to the nearest tenth as needed.) The population variance is 15.6. (Simplify your answer. Round to the nearest tenth as needed.) The population standard deviation is (Simplify your answer. Round to the nearest tenth as needed.)
A random sample of Californians has a mean age of 34.4, but you want to know the mean age of all Californians. It sounds like you want to generalize from a ________ to a _________, and therefore you need to worry about ________. a. population; sample; descriptive statistics b. statistic; parameter; sampling error c. central tendency measure; variability measure; random selection d. sample; population; operational definitions
Use the dataset below to fill in the blanks. The space between the data and the blanks isprovided so that you can show each data value's deviation and each data value's deviation squared.Sixteen families were selected at random and the number of children in each was recorded 0 0 0 1 1 2 2 2 2 2 3 3 4 6 8 12
222
A population has a mean μ = 83 and a standard deviation = 29. Find the mean and standard deviation of a sampling distribution of sample means with sample size n = 252. H=(Simplify your answer.) Example Get more help. Clear all Check answer
Recently, a random sample of 25-34 year olds was asked, "How much do you currently have in savings, not including retirement savings?" The data in the table represent the responses to the survey. Approximate the mean and standard deviation amount of savings. EEB Click the icon to view the frequency distribution for the amount of savings Frequency distribution of amount of savings The sample mean amount of savings is $ (Round to the nearest dollar as needed ) Savings $0-$199 Frequency 344 The sample standard deviation is $ $200-$399 93 (Round to the nearest dollar as needed.) 65 $400-$599 $600-$799 24 $800-$999 10 $1000-$1199 $1200-$1399 1 Print Done %23 e here to search lyi