Introduction to Probability and Statistics
Introduction to Probability and Statistics
14th Edition
ISBN: 9781133103752
Author: Mendenhall, William
Publisher: Cengage Learning
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Chapter 11.10, Problem 11.47E
To determine

To Find: A 95% confidence interval for the difference between the two corresponding population means.

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Calculate the 90% confidence interval for the population mean difference using the data in the attached image. I need to see where I went wrong.
Microsoft Excel snapshot for random sampling: Also note the formula used for the last column 02 x✓ fx =INDEX(5852:58551, RANK(C2, $C$2:$C$51)) A B 1 No. States 2 1 ALABAMA Rand No. 0.925957526 3 2 ALASKA 0.372999976 4 3 ARIZONA 0.941323044 5 4 ARKANSAS 0.071266381 Random Sample CALIFORNIA NORTH CAROLINA ARKANSAS WASHINGTON G7 Microsoft Excel snapshot for systematic sampling: xfx INDEX(SD52:50551, F7) A B E F G 1 No. States Rand No. Random Sample population 50 2 1 ALABAMA 0.5296685 NEW HAMPSHIRE sample 10 3 2 ALASKA 0.4493186 OKLAHOMA k 5 4 3 ARIZONA 0.707914 KANSAS 5 4 ARKANSAS 0.4831379 NORTH DAKOTA 6 5 CALIFORNIA 0.7277162 INDIANA Random Sample Sample Name 7 6 COLORADO 0.5865002 MISSISSIPPI 8 7:ONNECTICU 0.7640596 ILLINOIS 9 8 DELAWARE 0.5783029 MISSOURI 525 10 15 INDIANA MARYLAND COLORADO
Suppose the Internal Revenue Service reported that the mean tax refund for the year 2022 was $3401. Assume the standard deviation is $82.5 and that the amounts refunded follow a normal probability distribution. Solve the following three parts? (For the answer to question 14, 15, and 16, start with making a bell curve. Identify on the bell curve where is mean, X, and area(s) to be determined. 1.What percent of the refunds are more than $3,500? 2. What percent of the refunds are more than $3500 but less than $3579? 3. What percent of the refunds are more than $3325 but less than $3579?

Chapter 11 Solutions

Introduction to Probability and Statistics

Ch. 11.5 - Prob. 11.11ECh. 11.5 - Assembling Electronic Equipment An experiment was...Ch. 11.5 - Prob. 11.13ECh. 11.5 - Prob. 11.14ECh. 11.5 - Prob. 11.16ECh. 11.5 - The Cost of Lumber A national home builder wants...Ch. 11.6 - Prob. 11.19ECh. 11.6 - Prob. 11.20ECh. 11.6 - Prob. 11.21ECh. 11.6 - Prob. 11.22ECh. 11.6 - Prob. 11.23ECh. 11.6 - Prob. 11.26ECh. 11.8 - Prob. 11.28ECh. 11.8 - Prob. 11.29ECh. 11.8 - Do the data of Exercise 11.28 provide sufficient...Ch. 11.8 - Prob. 11.31ECh. 11.8 - Prob. 11.32ECh. 11.8 - Prob. 11.34ECh. 11.8 - The partially completed ANOVA table for a...Ch. 11.8 - Gas Mileage A study was conducted to compare...Ch. 11.8 - Prob. 11.38ECh. 11.8 - Prob. 11.39ECh. 11.8 - Digitalis and Calcium Uptake A study was conducted...Ch. 11.8 - Bidding on Construction Jobs A building contractor...Ch. 11.8 - Premium Equity? The cost of auto insurance varies...Ch. 11.8 - Prob. 11.43ECh. 11.8 - Prob. 11.44ECh. 11.10 - Prob. 11.45ECh. 11.10 - Prob. 11.46ECh. 11.10 - Prob. 11.47ECh. 11.10 - Prob. 11.48ECh. 11.10 - Prob. 11.49ECh. 11.10 - Demand for Diamonds A chain of jewelry stores...Ch. 11.10 - Terrain Visualization A study was conducted to...Ch. 11.10 - Prob. 11.52ECh. 11.10 - Prob. 11.53ECh. 11.10 - Prob. 11.54ECh. 11.10 - Prob. 11.55ECh. 11 - Prob. 11.56SECh. 11 - Prob. 11.57SECh. 11 - Prob. 11.58SECh. 11 - Prob. 11.59SECh. 11 - Prob. 11.60SECh. 11 - Prob. 11.61SECh. 11 - Prob. 11.62SECh. 11 - Prob. 11.63SECh. 11 - Prob. 11.64SECh. 11 - Prob. 11.65SECh. 11 - Prob. 11.66SECh. 11 - Prob. 11.67SECh. 11 - Yield of Wheat The yields of wheat(in bushels per...Ch. 11 - Prob. 11.69SECh. 11 - Professor’s Salaries In a study of starting...Ch. 11 - Prob. 11.71SECh. 11 - Prob. 11.72SECh. 11 - Prob. 11.73SECh. 11 - Prob. 11.74SE
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