Business Analytics
3rd Edition
ISBN: 9780135231715
Author: Evans
Publisher: PEARSON
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Textbook Question
Chapter A4, Problem 2PE
Construct histograms using the Histogram chart for the gross sales and gross profit data in the Excel file Sales Data.
Expert Solution & Answer
To determine
To construct histogram for gross sales and gross profit.
Explanation of Solution
Given:
The data contains Customer, Percent gross, gross sales, gross profit, Industry code and competitive rating.
Following is the process to construct histogram for gross sales:
First select column of gross sales then click on
Insert→Charts→Histogram
Histogram for gross sales is:
The shape of the distribution of data is right skewed.
Following is the histogram for gross profit:
The shape of the distribution of data is right skewed.
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To evaluate the success of a 1-year experimental program designed to increase the mathematical achievement of underprivileged high school seniors, a random sample of participants in the program will be selected and their mathematics scores will be compared with the previous year’s statewide average of 525 for underprivileged seniors. The researchers want to determine whether the experimental program has increased the mean achievement level over the previous year’s statewide average. If alpha=.05, what sample size is needed to have a probability of Type II error of at most .025 if the actual mean is increased to 550? From previous results, sigma=80.
Chapter A4 Solutions
Business Analytics
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