Question

Assume that the differences are normally distributed. Complete parts ​(a) through ​(d) below. Observation 1 2...

Assume that the differences are normally distributed. Complete parts ​(a) through ​(d) below.

Observation

1

2

3

4

5

6

7

8

Xi

45.2

45.5

43.5

48.5

50.6

43.4

50.2

43.7

Yi

50.1

46.4

47.4

52.8

52.5

45.5

50.9

46.2

​(a) Determine di=Xi−Yi for each pair of data.

Observation

1

2

3

4

5

6

7

8

di

  

​(Type integers or​ decimals.)

​(b) Compute d bar and sd.

(c) Test if μd<0 at the α=0.05 level of significance. What are the correct null and alternative​ hypotheses?

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