Answer:
B) The null hypothesis cannot be rejected since the test statistic is approximately t = .29,which is not in the rejection region.
Step-by-step explanation:
to calculate mean
14.25+ 13.7 +14.02
+14.13+ 13.99 +14.04
= 84.13/6
= 14.02167
average = 14
s = 0.1837
test statistics t:
(bar(x)-mu)/(s/√n)
= 14.02167-14/0.1837/√6
0.02167/0.1837/2.4495
= 0.02167/0.07499
=0.28897
this is approximately 0.29
<u>therefore B) The null hypothesis cannot be rejected since the test statistic is approximately t = .29,which is not in the rejection region.</u>
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D
Number of hours is x values and cost of service is y.
To find slope you have to find the change in y over the change in x.
We can use any points in the table to calculate this amount.
Eg, 3-5 hours and 125-175 dollars.
The difference in y values is $50 and the difference in hours is 2.
50/2=25
The slope is 25
