STAT. TECH. FOR BUSINESS AND ECO (LL)
STAT. TECH. FOR BUSINESS AND ECO (LL)
18th Edition
ISBN: 9781265679637
Author: Lind
Publisher: MCG
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Chapter 8, Problem 7E

a.

To determine

Give the all possible samples of size 3.

Find the mean of each sample.

b.

To determine

Find the mean of the distribution of the sample mean.

Compare the mean of the sample means to the population mean.

c.

To determine

Give the comparison of the dispersion in the population with that of the sample mean.

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ged the variance for group 1) Different groups of male stalk-eyed flies were raised on different diets: a high nutrient corn diet vs. a low nutrient cotton wool diet. Investigators wanted to see if diet quality influenced eye-stalk length. They obtained the following data: d Diet Sample Mean Eye-stalk Length Variance in Eye-stalk d size, n (mm) Length (mm²) Corn (group 1) 21 2.05 0.0558 Cotton (group 2) 24 1.54 0.0812 =205-1.54-05T a) Construct a 95% confidence interval for the difference in mean eye-stalk length between the two diets (e.g., use group 1 - group 2).
An article in Business Week discussed the large spread between the federal funds rate and the average credit card rate. The table below is a frequency distribution of the credit card rate charged by the top 100 issuers. Credit Card Rates Credit Card Rate Frequency 18% -23% 19 17% -17.9% 16 16% -16.9% 31 15% -15.9% 26 14% -14.9% Copy Data 8 Step 1 of 2: Calculate the average credit card rate charged by the top 100 issuers based on the frequency distribution. Round your answer to two decimal places.
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