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One cable company claims that it has excellent customer service. In fact, the company advertises that a technician will arrive within 60 minutes after a service call is placed. One frustrated customer believes this is not accurate, claiming that it takes over 60 minutes for the cable technician to arrive. The customer asks a simple random sample of 25 other cable customers how long it has taken for the cable technician to arrive when they have called for one. The sample mean for this group is 63.4 minutes with a standard deviation of 15.1 minutes. Assume that the population distribution is approximately normal. Test the customer's claim at the 0.025 level of significance. Step 3 of 3: Draw a conclusion and interpret the decision. Answer Tables Кeypad Keyboard Shortcuts We reject the null hypothesis and conclude that there is sufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We reject the null hypothesis and conclude that there is insufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We fail to reject the null hypothesis and conclude that there is sufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive.

One cable company claims that it has excellent customer service. In fact, the company advertises that a technician will arrive within 60 minutes after a service call is placed. One frustrated customer believes this is not accurate, claiming that it takes over 60 minutes for the cable technician to arrive. The customer asks a simple random sample of 25 other cable customers how long it has taken for the cable technician to arrive when they have called for one. The sample mean for this group is 63.4 minutes with a standard deviation of 15.1 minutes. Assume that the population distribution is approximately normal. Test the customer's claim at the 0.025 level of significance. Step 3 of 3: Draw a conclusion and interpret the decision. Answer Tables Кeypad Keyboard Shortcuts We reject the null hypothesis and conclude that there is sufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We reject the null hypothesis and conclude that there is insufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We fail to reject the null hypothesis and conclude that there is sufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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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One cable company claims that it has excellent customer service. In fact, the company advertises that a technician will arrive within 60 minutes after a service call is placed. One frustrated customer believes this is not accurate, claiming that it takes over 60 minutes for the cable technician to arrive. The customer asks a simple random sample of 25 other cable customers how long it has taken for the cable technician to arrive when they have called for one. The sample mean for this group is 63.4 minutes with a standard deviation of 15.1 minutes. Assume that the population distribution is approximately normal. Test the customer's claim at the 0.025 level of significance. Step 3 of 3: Draw a conclusion and interpret the decision. 田 Tables E Keypad Answer Keyboard Shortcuts We reject the null hypothesis and conclude that there is sufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We reject the null hypothesis and conclude that there is insufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We fail to reject the null hypothesis and conclude that there is sufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive.
Transcribed Image Text:One cable company claims that it has excellent customer service. In fact, the company advertises that a technician will arrive within 60 minutes after a service call is placed. One frustrated customer believes this is not accurate, claiming that it takes over 60 minutes for the cable technician to arrive. The customer asks a simple random sample of 25 other cable customers how long it has taken for the cable technician to arrive when they have called for one. The sample mean for this group is 63.4 minutes with a standard deviation of 15.1 minutes. Assume that the population distribution is approximately normal. Test the customer's claim at the 0.025 level of significance. Step 3 of 3: Draw a conclusion and interpret the decision. 田 Tables E Keypad Answer Keyboard Shortcuts We reject the null hypothesis and conclude that there is sufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We reject the null hypothesis and conclude that there is insufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We fail to reject the null hypothesis and conclude that there is insufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive. We fail to reject the null hypothesis and conclude that there is sufficient evidence at a 0.025 level of significance that it takes over 60 minutes for the cable technician to arrive.
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