One cable company claims that it has excellent customer service. In fact, the company advertises that a technician will arrive within 55 minutes after a service call is placed. One frustrated customer believes this is not accurate, claiming that it takes over 55 minutes for the cable technician to arrive. The customer asks a simple random sample of 4 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 62.1 minutes with a standard deviation of 8.3 minutes. Assume that the population distribution is approximately normal. Test the customer’s claim at the 0.05 level of significance.   Step 3 of 3: Draw a conclusion and interpret the decision.   1. We reject the null hypothesis and conclude that there is suffiecient evidence at a 0.05 level of significance to support the belief that it takes over 55 minutes for the cable technacian to arrive.   2. We reject the null hypothesis and conclude that there is insuffiecient evidence at a 0.05 level of significance to support the belief that it takes over 55 minutes for the cable technacian to arrive.   3. We fail to reject he null hypothesis and conclude that there is insuffiecient evidence at a 0.05 level of significance to support the belief that it takes over 55 minutes for the cable technacian to arrive.   4. We fail to reject he null hypothesis and conclude that there is suffiecient evidence at a 0.05 level of significance to support the belief that it takes over 55 minutes for the cable technacian to arrive.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Topic Video
Question
One cable company claims that it has excellent customer service. In fact, the company advertises that a technician will arrive within 55 minutes after a service call is placed. One frustrated customer believes this is not accurate, claiming that it takes over 55 minutes for the cable technician to arrive. The customer asks a simple random sample of 4 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 62.1 minutes with a standard deviation of 8.3 minutes. Assume that the population distribution is approximately normal. Test the customer’s claim at the 0.05 level of significance.
 
Step 3 of 3: Draw a conclusion and interpret the decision.
 
1. We reject the null hypothesis and conclude that there is suffiecient evidence at a 0.05 level of significance to support the belief that it takes over 55 minutes for the cable technacian to arrive.
 
2. We reject the null hypothesis and conclude that there is insuffiecient evidence at a 0.05 level of significance to support the belief that it takes over 55 minutes for the cable technacian to arrive.
 
3. We fail to reject he null hypothesis and conclude that there is insuffiecient evidence at a 0.05 level of significance to support the belief that it takes over 55 minutes for the cable technacian to arrive.
 
4. We fail to reject he null hypothesis and conclude that there is suffiecient evidence at a 0.05 level of significance to support the belief that it takes over 55 minutes for the cable technacian to arrive.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Data Collection, Sampling Methods, and Bias
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman