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Question

Construct a 90% confidence interval for (u1- u2)



For some reason I am getting it

wrong, (-19.404) (-1.196), round to 3 decimal places pease. Explain in details please, I need to study the calculations step by step.


Screen Shot 2019-11-02 at 3.51.28 PM.png

Screen Shot 2019-11-02 at 3.51.28 PM.png

Independent random samples from approximately normal populations produced the results shown below. Complete parts a and b.
Full data set
Sample 1
Sample 2
49
28
36
35
43
43
21
70
58
53
53
58
36
56
52
28
36
39
45
60
A. HO: H1 - 12 = 0, Ha: H1 - 12 # 0
OB. HO: H1 - H2 = 0, Ha: H1 - H2 <0
O C. Ho: H1 - H2 = 0, Ha: H1 - H2 >0
Now find the test statistic.
t= - 1.90 (Round to two decimal places as needed.)
Find the p-value.
p-value = 0.08 (Round to two decimal places as needed.)
Choose the correct conclusion below.
O A. Do not reject Ho. There is sufficient evidence that the means differ.
O B. Reject Ho. There is insufficient evidence that the means differ.
C. Reject Ho. There is sufficient evidence that the means differ.

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