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Name: CCN and Act-Media provided a television channel targeted to individual
Uploaded: 2024-03-20T07:07:12.000Z
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Description: CCN and Act-Media provided a television channel targeted to individuals waiting in supermarket checkout lines. The population means the time a shopper stands in a supermarket checkout line is 8 minutes, and it is normally distributed. A sample of 120

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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CCN and Act-Media provided a television channel targeted to individuals waiting in supermarket checkout lines. The population means the time a shopper stands in a supermarket checkout line is 8 minutes, and it is normally distributed. A sample of 120 shoppers showed a sample mean waiting time of 8.4 minutes. Assume the population standard deviation (σ) is 3.2 minutes and the marketing team is willing the test the following hypotheses.

H_o: μ ≤ 8

H_a: μ > 8

a) Decide the appropriate type of testing based on above hypotheses and calculate the test statistics.

b) What is the p-value?

c) At α =.01 level of significance, what is your conclusion?

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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