To raise awareness of its capabilities, FedEx developed a sales promotion that was

sent to selected offices.To assess the possible benefit of the promotion, FedEx pulled

the shipping records for a random sample of 50 offices that received the promotion and

another random sample of 75 that did not and collected data on the number of mailings.

They want to see if those who received the sales promotions shipped more mailings.

(The complete set of results is provided below question e)

A. State the null and alternate hypotheses

B. Run the test.Paste the test output, and state your decision.

C. What is the best estimate for the population difference in means for the number of

mailings between offices with the promotion and offices without the promotion?(Be

99% confident in your estimate for the confidence interval)

D. Interpret the confidence interval in part c.

E. What is the margin of error associated with 99% confidence interval?

Set of results:

Promotion	Mailings		Promotion	Mailings
Promotions_NO	15		Promotions_YES	38
Promotions_NO	49		Promotions_YES	74
Promotions_NO	42		Promotions_YES	18
Promotions_NO	22		Promotions_YES	65
Promotions_NO	26		Promotions_YES	60
Promotions_NO	35		Promotions_YES	51
Promotions_NO	38		Promotions_YES	71
Promotions_NO	13		Promotions_YES	47
Promotions_NO	35		Promotions_YES	29
Promotions_NO	14		Promotions_YES	39
Promotions_NO	5		Promotions_YES	45
Promotions_NO	64		Promotions_YES	36
Promotions_NO	27		Promotions_YES	57
Promotions_NO	57		Promotions_YES	36
Promotions_NO	50		Promotions_YES	12
Promotions_NO	43		Promotions_YES	20
Promotions_NO	32		Promotions_YES	23
Promotions_NO	39		Promotions_YES	79
Promotions_NO	13		Promotions_YES	16
Promotions_NO	19		Promotions_YES	4
Promotions_NO	47		Promotions_YES	62
Promotions_NO	45		Promotions_YES	37
Promotions_NO	38		Promotions_YES	2
Promotions_NO	59		Promotions_YES	23
Promotions_NO	35		Promotions_YES	6
Promotions_NO	8		Promotions_YES	10
Promotions_NO	10		Promotions_YES	28
Promotions_NO	58		Promotions_YES	65
Promotions_NO	44		Promotions_YES	25
Promotions_NO	9		Promotions_YES	86
Promotions_NO	10		Promotions_YES	27
Promotions_NO	0		Promotions_YES	58
Promotions_NO	42		Promotions_YES	33
Promotions_NO	37		Promotions_YES	54
Promotions_NO	23		Promotions_YES	40
Promotions_NO	12		Promotions_YES	92
Promotions_NO	54		Promotions_YES	71
Promotions_NO	41		Promotions_YES	0
Promotions_NO	36		Promotions_YES	77
Promotions_NO	43		Promotions_YES	60
Promotions_NO	45		Promotions_YES	56
Promotions_NO	18		Promotions_YES	38
Promotions_NO	65		Promotions_YES	16
Promotions_NO	10		Promotions_YES	89
Promotions_NO	17		Promotions_YES	62
Promotions_NO	59		Promotions_YES	9
Promotions_NO	26		Promotions_YES	42
Promotions_NO	18		Promotions_YES	73
Promotions_NO	8		Promotions_YES	49
Promotions_NO	14		Promotions_YES	14
Promotions_NO	74
Promotions_NO	29
Promotions_NO	60
Promotions_NO	19
Promotions_NO	30
Promotions_NO	29
Promotions_NO	12
Promotions_NO	0
Promotions_NO	20
Promotions_NO	31
Promotions_NO	13
Promotions_NO	5
Promotions_NO	7
Promotions_NO	42
Promotions_NO	36
Promotions_NO	9
Promotions_NO	23
Promotions_NO	70
Promotions_NO	28
Promotions_NO	25
Promotions_NO	26
Promotions_NO	24
Promotions_NO	50
Promotions_NO	7
Promotions_NO	0