Choose 1 answer: We cannot reject the hypothesis. We should reject the hypothesis. Measured % of satisfied customers Frequency
Choose 1 answer: We cannot reject the hypothesis. We should reject the hypothesis. Measured % of satisfied customers Frequency
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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Transcribed Image Text:What should we conclude regarding the hypothesis?
Choose 1 answer:
We cannot reject the hypothesis.
We should reject the hypothesis.
Measured % of satisfied customers
Frequency
80
82.5
24
85
72
87.5
181
90
281
92.5
272
95
136
97.5
27
100

Transcribed Image Text:Mateus's bank issued an advertisement saying that 90% of its customers are satisfhed with the bank's
services. Since he himself wasn''t very satisfied, he suspected the ad is false. He surveyed a random sample
of 80 of the bank's customers, and found that only 80% were satisfed.
Let's test the hypothesis that the actual percentage of satisfied customers is 90% versus the alternative
that the actual percentage is lower than that.
The table below sums up the results of 1000 simulations, each simulating a sample of 80 customers,
assuming there are 90% satisfied customers
According to the simulations, what is the probability of getting a sample with 80% satisfied customers or
less?
Let's agree that if the observed outcome has a probability less than 1% under the tested hypothesis, we
will reject the hypothesis.
What should we conclude regarding the hypothesis?
Choose 1 answer:
We cannot reject the hypothesis.
We should reject the hypothesis.
Measured % of satisfed customers
Frequency
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