Business Analytics (2nd Edition)
2nd Edition
ISBN: 9780321997821
Author: James R. Evans
Publisher: PEARSON
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Chapter 3, Problem 23PE
To determine
To use Histogram to construct a frequency distribution of the lunch sales amounts.
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32. Consider a normally distributed population with mean μ = 80
and standard deviation σ = 14.
a.
Construct the centerline and the upper and lower control
limits for the chart if samples of size 5 are used.
b. Repeat the analysis with samples of size 10.
2080 101
c. Discuss the effect of the sample size on the control limits.
Consider the following hypothesis test.
The following results are for two independent samples taken from the two populations.
Sample 1
Sample 2
n 1 = 80
n 2 = 70
x 1 = 104
x 2 = 106
σ 1 = 8.4
σ 2 = 7.6
What is the value of the test statistic? If required enter negative values as negative numbers (to 2 decimals).
What is the p-value (to 4 decimals)? Use z-table.
With = .05, what is your hypothesis testing conclusion?
Periodically, Merrill Lynch customers are asked to evaluate Merrill Lynch financial consultants and services (2000 Merrill Lynch Client Satisfaction Survey). Higher ratings on the client satisfaction survey indicate better service with 7 the maximum service rating. Independent samples of service ratings for two financial consultants are summarized here. Consultant A has 10 years of experience, whereas consultant B has 1 year of experience. Use = .05 and test to see whether the consultant with more experience has the higher population mean service rating.
Consultant A
Consultant B
= 16
= 10
= 6.82
= 6.25
= .64
= .75
State the null and alternative hypotheses.H0: 1 - 2 Ha: 1 - 2
Compute the value of the test statistic (to 2 decimals).
What is the p-value?The p-value is
What is your conclusion?
Chapter 3 Solutions
Business Analytics (2nd Edition)
Ch. 3 - Create a line chart for the closing prices for all...Ch. 3 - Create a pie chart showing the breakdown of...Ch. 3 - The Excel tile Facebook Survey provides data...Ch. 3 - A national homebuilder builds single-family homes...Ch. 3 - Create a bubble chart for the first five colleges...Ch. 3 - Construct a column chart for the data in the Excel...Ch. 3 - The Excel file Internet Usage provides data about...Ch. 3 - Construct an appropriate chart to show the...Ch. 3 - In the Excel file Banking Data, apply the...Ch. 3 - Apply three different colors of data bars to...
Ch. 3 - For the Store and Regional Sales database, apply a...Ch. 3 - For the Excel file Closing Stock Prices, Apply...Ch. 3 - Convert the Store and Regional Sales database to...Ch. 3 - Prob. 14PECh. 3 - Prob. 15PECh. 3 - Prob. 16PECh. 3 - Prob. 17PECh. 3 - In the Purchase Orders database, conduct a Pareto...Ch. 3 - Use Excels filtering capability to (1) extract all...Ch. 3 - Prob. 20PECh. 3 - The Excel file Credit Risk Date Provides...Ch. 3 - Prob. 22PECh. 3 - Prob. 23PECh. 3 - A community health-status survey obtained the...Ch. 3 - Prob. 25PECh. 3 - Prob. 26PECh. 3 - Prob. 27PECh. 3 - Prob. 28PECh. 3 - Prob. 29PECh. 3 - Prob. 30PECh. 3 - Find the 10th and 90th percentiles and 1st, 2nd,...Ch. 3 - Construct cross-tabulations of Gender versus...Ch. 3 - Use PivotTables to construct a cross-tabulation...Ch. 3 - Use PivotTables to construct a cross-tabulation...Ch. 3 - Create a PivotTable to find the average amount of...Ch. 3 - Use PivotTables to find the number of loans by...Ch. 3 - Use PivotTables to find the number of sales...Ch. 3 - Create a PivotTable for the data in the Excel file...Ch. 3 - The Excel File Rins Gym provides sample data on...Ch. 3 - Create useful dashboards for each of the following...Ch. 3 - A marketing researcher surveyed 92 individuals,...
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