Historically, the industries with the most complaints to the Better Business Bureau have been banks, cable and satellite television companies, collection agencies, cellular phone providers, and new car dealerships. The results for a sample of 200 complaints are contained in the file B

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Historically, the industries with the most complaints to the Better Business Bureau have been banks, cable and satellite television companies, collection agencies, cellular phone providers, and new car dealerships. The results for a sample of 200 complaints are contained in the file BBB. Click on the datafile logo to reference the data.

Historically, the industries with the most complaints to the Better Business Bureau have been banks, cable and satellite television companies, collection agencies, cellular phone providers, and new car
dealerships. The results for a sample of 200 complaints are contained in the file BBB. Click on the datafile logo to reference the data.
DATA file
a. Construct a frequency distribution for the number of complaints by industry.
Observed
Category
Frequency
Bank
26
Cable
44
Car
42
Cell
60
Collection
28
Total
200
b. Using a = 0.01, conduct a hypothesis test to determine whether the probability of a complaint is the same for the five industries.
The test-statistic is
(to 3 decimals).
p-value =
(to 4 decimals)
What is your conclusion?
Select your answer -
c. Which industry has the most complaints?
- Select your answer - v
Dropping the industry with the most complaints using a = 0.05, conduct a hypothesis test to determine whether the probability of a complaint is the same for the remaining four industries.
The test-statistic is
(to 3 decimals).
p-value =
(to 4 decimals)
What is your conclusion?
Select your answer -
Transcribed Image Text:Historically, the industries with the most complaints to the Better Business Bureau have been banks, cable and satellite television companies, collection agencies, cellular phone providers, and new car dealerships. The results for a sample of 200 complaints are contained in the file BBB. Click on the datafile logo to reference the data. DATA file a. Construct a frequency distribution for the number of complaints by industry. Observed Category Frequency Bank 26 Cable 44 Car 42 Cell 60 Collection 28 Total 200 b. Using a = 0.01, conduct a hypothesis test to determine whether the probability of a complaint is the same for the five industries. The test-statistic is (to 3 decimals). p-value = (to 4 decimals) What is your conclusion? Select your answer - c. Which industry has the most complaints? - Select your answer - v Dropping the industry with the most complaints using a = 0.05, conduct a hypothesis test to determine whether the probability of a complaint is the same for the remaining four industries. The test-statistic is (to 3 decimals). p-value = (to 4 decimals) What is your conclusion? Select your answer -
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