a.
To explain: Whether the two-sample procedure could be used here or not.
a.
Answer to Problem 46E
Yes.
Explanation of Solution
Given:
Formula used:
The formula to compute the confidence interval is:
Here, it is given that the sample sizes are 92 and 86 respectively which are above the required
b.
To find: The 90% confidence interval for the difference between the mean ratings and interpret it.
b.
Answer to Problem 46E
The confidence interval is (413.62, 634.64).
Explanation of Solution
Calculation:
The 95% confidence interval for the difference between the mean ratings using Ti-83 calculator can be calculated as:
Thus, the confidence interval is (0.2264, 0.6936).
Interpretation:
There is 95% probability that the mean difference between the ratings is between $413.62 and $634.64.
c.
To interpret: The confidence interval computed in above part.
c.
Explanation of Solution
The confidence interval shows that on an average 95% of the samples have confidence interval that are containing the mean difference of the ratings of the reliability for Hispanic and Anglo customers of bank.
Chapter 10 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Introductory Statistics
Introductory Statistics (2nd Edition)
Introductory Statistics (10th Edition)
Statistics: The Art and Science of Learning from Data (4th Edition)
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