Find the 95% confidence interval for the difference in population means between city A and city B. The 95% confidence interval for HA-HB is 0. (Round to two decimal places as needed. Use ascending order.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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A study was carried out to compare mean customer satisfaction scores at service
centers in city A, in city B, and in city C. The sample means on a scale of 0 to 10
were 8.4 in city A, 8.6 in city B, and 7.9 in city C. Each sample size = 100, MS
error = 0.41, and the F test statistic= 27.4 has P-value <0.001. Complete parts a
through d.
a. What is the margin of error for separate 95% confidence intervals? (For df = 297,
¹.025 = 1.968.)
...
margin of error = 0.18 (Round to two decimal places as needed.)
b. Find the 95% confidence interval for the difference in population means for each
pair of service centers. Interpret.
Find the 95% confidence interval for the difference in population means between city
A and city B.
The 95% confidence interval for HA-HBis (D).
(Round to two decimal places as needed. Use ascending order.)
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A
Transcribed Image Text:A study was carried out to compare mean customer satisfaction scores at service centers in city A, in city B, and in city C. The sample means on a scale of 0 to 10 were 8.4 in city A, 8.6 in city B, and 7.9 in city C. Each sample size = 100, MS error = 0.41, and the F test statistic= 27.4 has P-value <0.001. Complete parts a through d. a. What is the margin of error for separate 95% confidence intervals? (For df = 297, ¹.025 = 1.968.) ... margin of error = 0.18 (Round to two decimal places as needed.) b. Find the 95% confidence interval for the difference in population means for each pair of service centers. Interpret. Find the 95% confidence interval for the difference in population means between city A and city B. The 95% confidence interval for HA-HBis (D). (Round to two decimal places as needed. Use ascending order.) NOV 10 tv Clear all Check answer NI A
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