statistics/

graded_assignment_8.xlsx

#1-5

Lengths (in)	In column A are listed the lengths (in inches) of 54 anesthetized bears.
53.0
67.5	#1	Find the point estimates of the mean and standard deviation.			(5 points)
72.0
72.0	#2	Find the standard error and margin of error for a 95% confidence interval. (5 points)
62.0
70.0	#3	Find the 95% confidence interval.	(5 points)
73.5
68.5	#4	Write a sentence interpreting the confidence interval.		(5 points)
64.0
58.0
73.0	#5	According to the confidence interval, could the population mean length of bears be 60 inches? Explain briefly. (5 points)
37.0
63.0
67.0
52.0
59.0
64.0
36.0
59.0
72.0
57.5
61.0
54.0
40.0
63.0
43.0
66.5
60.5
60.0
61.0
40.0
64.0
65.0
49.0
47.0
59.0
72.0
65.0
63.0
70.5
48.0
50.0
76.5
46.0
61.5
63.5
48.0
41.0
53.0
52.5
46.0
43.5
75.0
57.3

Nicotine content (mg)	The nicotine content of 29 brands of cigarettes are listed in column A.
1.2
0.2	#6	Find the point estimates of the mean and standard deviation.				(5 points)
1.2
1.4	#7	Find the standard error and margin of error for a 95% confidence interval. (5 points)
1.0
1.2	#8	Find the 95% confidence interval.		(5 points)
0.8
1.1	#9	Write a sentence interpreting the confidence interval.			(5 points)
0.1
1.0	#10	Does the confidence interval support the assertion that the population mean nicotine content of cigarettes is 1.0 mg?
0.8		Explain briefly.	(5 points)
0.8
1.0
1.0
1.0
1.0
1.0
0.5
1.1
0.6
1.2
0.7
1.2
1.4
0.7
1.1
0.9
0.8
1.3