The owner of a cell phone store at Greenhill’s Shopping Center was not happy when he learned that the average number of cell phones sold daily was only 8 mobile phones. He hired a new seller and told him to tally the daily sales for 20 days. The following are the number of cell phones sold for the past 20 days. 9 9 9 8 9 9 11 12 12 16 10 12 8 11 17 18 15 14 17 14 Do the collected data present sufficient evidence to indicate that the average number of cell phones sold daily has increased? Use 0.05 level of significance. Assume normality in the population
The owner of a cell phone store at Greenhill’s Shopping Center was not happy when he learned that the average number of cell phones sold daily was only 8 mobile phones. He hired a new seller and told him to tally the daily sales for 20 days. The following are the number of cell phones sold for the past 20 days. 9 9 9 8 9 9 11 12 12 16 10 12 8 11 17 18 15 14 17 14 Do the collected data present sufficient evidence to indicate that the average number of cell phones sold daily has increased? Use 0.05 level of significance. Assume normality in the population
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.2: Representing Data
Problem 22PFA
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The owner of a cell phone store at Greenhill’s Shopping Center was not happy when he learned that the average number of cell phones sold daily was only 8 mobile phones. He hired a new seller and told him to tally the daily sales for 20 days. The following are the number of cell phones sold for the past 20 days.
9 | 9 | 9 | 8 | 9 |
9 | 11 | 12 | 12 | 16 |
10 | 12 | 8 | 11 | 17 |
18 | 15 | 14 | 17 | 14 |
Do the collected data present sufficient evidence to indicate that the average number of cell phones sold daily has increased? Use 0.05 level of significance. Assume normality in the population.
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