Question 49The average movie admission price for a recent year was $7.18. The populationvariance was 3.81. A random sample of 15 theater admission prices had a mean of $8.02with a standard deviation of $2.08. At a = 0.05, is there sufficient evidence to conclude adifference from the population variance? Assume the variable is normally distributed.What is the null hypothesis in this problem?a) ²3.81Ob) 23.81Oc)²3.81d) ²3.81Oe) ² = 3.81O²>3.81

Assume that is the population variance of movie admission price for the recent year.

Answered: The average movie admission price for a…

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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Researchers at the National Weather Center in Portland, Maine recorded the number of 90° days each year since records were first kept, starting in 1875. The number of 90° days form a normal-shaped distribution, with a mean of μ = 9.6 days and a standard deviation of σ = 1.9. To see if the data showed any evidence of climate change (and specifically global warming), they also computed the mean number of 90° days for the most recent n = 4 years and obtained a mean number of days for the past four years of x̅ = 12.25 days. Using a one-tailed test with α = .05, the researchers completed the calculations, but they need your help in drawing an appropriate conclusion. (According to their calculations, the standard error is sM = 0.95, and the sample mean of x̅ = 12.25 days corresponds to a z-score of z = 2.79.) Using the same one-tailed test (α = .05), determine if the data indicate that the past four years have had significantly more 90° days than would be expected for a random sample from…

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