4. Smith Electronics is a family-owned electronics repair business in Kansas City. The owner has read an advertisement from a local competitor that guarantees all high-definition television (HDTV) repairs within four days. Based on his company's experience, he wants to know if he can offer a similar guarantee. His past service records are used to determine the following probability distribution: Number of Days Probability 1 0.12 2 0.25 3 0.30 4 0.18 5 0.15 (A) Calculate the mean number of days his customers wait for an HDTV repair. (B) Also calculate the variance and standard deviation. (C) Based on the calculations in parts a and b, what conclusion should the manager reach regarding his company's repair times?
4. Smith Electronics is a family-owned electronics repair business in Kansas City. The owner has read an advertisement from a local competitor that guarantees all high-definition television (HDTV) repairs within four days. Based on his company's experience, he wants to know if he can offer a similar guarantee. His past service records are used to determine the following probability distribution: Number of Days Probability 1 0.12 2 0.25 3 0.30 4 0.18 5 0.15 (A) Calculate the mean number of days his customers wait for an HDTV repair. (B) Also calculate the variance and standard deviation. (C) Based on the calculations in parts a and b, what conclusion should the manager reach regarding his company's repair times?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
Answer for Sections A, B, C
Transcribed Image Text:4. Smith Electronics is a family-owned electronics repair business in Kansas City. The owner has
read an advertisement from a local competitor that guarantees all high-definition television (HDTV)
repairs within four days. Based on his company's experience, he wants to know if he can offer a
similar guarantee. His past service records are used to determine the following probability
distribution:
Number of Days
Probability
1
0.12
2
0.25
3
0.30
4
0.18
0.15
(A) Calculate the mean number of days his customers wait for an HDTV repair.
(B) Also calculate the variance and standard deviation.
(C) Based on the calculations in parts a and b, what conclusion should the manager reach regarding
his company's repair times?
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