Answered: Starship Media Entertainment's budget…

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section: Chapter Questions

Problem 8SGR

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Question

Starship Media Entertainment's budget director, Ms. Janice Hammington, wanted to compare the daily travel expenses for the audit staff and the sales staff. For this reason, she gathered the following sample data. Audit ($) 130 102 129 143 149 120 139 Sales ($) 131 135 146 165 136 142 At the 0.10 significance level, can she conclude that the mean daily expenses are greater for the sales staff than the audit staff? (Assume that the variable is normally distributed.) Additionally, using the given information, conduct a test whether the variances of expenses for audit and sales staff are equal.

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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