Find the sample size needed to estimate the mean age of movie patrons such that it can be said with95% confidence that the sample mean is within 2 years of the population mean. Assume that o = 19.5years, based on a previous report. Should the sample be obtained from one movie at one theater?The required sample size is..(Round up to the nearest integer.)

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Answered: Find the sample size needed to estimate…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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An IQ test is designed so that the mean is 100 and the standard deviation is 21 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 95% confidence that the sample mean is within 5 IQ points of the true mean. Assume that σ=21 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation.
Consider a sample data with x=25 and s=2. Compute a chebyshev’s interval for which at least 89% of the data will lie?
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You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 82%. You would like to be 99% confident that your estimate is within 5% of the true population proportion. How large of a sample size is required? Hint: Video [:] = ת Submit Question Rasmuss habits-9ed-Pal 7- 7,324 NOV 1 PAGES 19 tv MacBook Air
Find the sample size needed to estimate the mean age of movie patrons such that it can be said with 90% confidence that the sample mean is within 1 year of the population mean. Assume that =19.3 years, based on a previous report. Could the sample be obtained from one movie at one theater? THe required sample size is?
The pulse rates of 168 randomly selected adult males vary from a low of 39 bpm to a high of 111 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 98% confidence that the sample mean is within 2 bpm of the population mean. Complete parts (a) through (c) below
The data below give the wait time in seconds for a random sample of callers when calling a local pizza restaurant. {66, 37, 4, 47, 12, 16, 62, 12, 21, 25, 49, 3} a. What is the point estimate for the average wait time for callers? b. Verify conditions for using this sample to predict population mean of wait times. Estimate the mean wait time for all callers to this restaurant, with 90% confidence. Write your answer as a sentence. C. d. Estimate the standard deviation of wait times for all callers to this restaurant, with 90% confidence. Write your answer as a sentence. (You do not need to check requirements.)
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