Time in Supermarket Checkout Lines. CCN and ActMedia provided a television channel targeted to individuals waiting in supermarket checkout lines. The channel showed news, short features, and advertisements. The length of the program was based on the assumption that the population mean time a shopper stands in a super-market checkout line is 8 minutes. A sample of actual waiting times will be used to test this assumption and determine whether actual mean waiting time differs from this standard. a) Formulate the hypotheses for this application. b) A sample of 120 shoppers showed a sample mean waiting time of 8.4 minutes. Assume a population standard deviation of s = 3.2 minutes. What is the p-value? c) At a = .05, what is your conclusion?

Time in Supermarket Checkout Lines. CCN and ActMedia provided a television channel targeted to individuals waiting in supermarket checkout lines. The channel showed news, short features, and advertisements. The length of the program was based on the assumption that the population mean time a shopper stands in a super-market checkout line is 8 minutes. A sample of actual waiting times will be used to test this assumption and determine whether actual mean waiting time differs from this standard. a) Formulate the hypotheses for this application. b) A sample of 120 shoppers showed a sample mean waiting time of 8.4 minutes. Assume a population standard deviation of s = 3.2 minutes. What is the p-value? c) At a = .05, what is your conclusion?

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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Concept explainers

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

Time in Supermarket Checkout Lines. CCN and ActMedia provided a television channel targeted to
individuals waiting in supermarket checkout lines. The channel showed news, short features, and
advertisements. The length of the program was based on the assumption that the population mean time
a shopper stands in a super-market checkout line is 8 minutes. A sample of actual waiting times will be
used to test this assumption and determine whether actual mean waiting time differs from this standard.
a) Formulate the hypotheses for this application.
b) A sample of 120 shoppers showed a sample mean waiting time of 8.4 minutes.
Assume a population standard deviation of s = 3.2 minutes. What is the p-value?
c) At a = .05, what is your conclusion?
d) Compute a 95% confidence interval for the population mean. Does it support your conclusion?

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