Bots, call-in customer service phone line received a total of 56% positive reviews from customers when the customers were asked to rate their call-in experience. The CEO conducts a test of significance as follows:

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Last year at Berries Bots, the call-in customer service phone line received a total of 56% positive
reviews from customers when the customers were asked to rate their call-in experience. The CEO
conducts a test of significance as follows:
Ho:n = 0.56
Ha:n < 0.56
The CEO obtains a random sample 517 customers who called into the phone line this year with 277
customers who had a positive review.
(a) Write out the null and alternative hypotheses in contextual words.
(b) Explain whether it would be appropriate to use a theoretical approach to conduct a statistical
analysis, and explain how you know.
Transcribed Image Text:Last year at Berries Bots, the call-in customer service phone line received a total of 56% positive reviews from customers when the customers were asked to rate their call-in experience. The CEO conducts a test of significance as follows: Ho:n = 0.56 Ha:n < 0.56 The CEO obtains a random sample 517 customers who called into the phone line this year with 277 customers who had a positive review. (a) Write out the null and alternative hypotheses in contextual words. (b) Explain whether it would be appropriate to use a theoretical approach to conduct a statistical analysis, and explain how you know.
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