The average monthly cell phone bill was reported last year to be $53.88 by the U.S. Wireless Industry. Random sampling of a large cell phone company found the current monthly cell phone charges (in dollars) in the table on the left. At the 0.05 level of significance, can it be concluded that the average cell phone bill has increased? Also find an 85% confidence interval estimate of the current mean monthly cell phone bill. table: 55.83 60.47 58.60 49.88 52.45 51.26 32.98 49.20 70.42 50.02 75.04 41.88 35.00 61.58 58.99 61.25 62.00 80.21 73.60 71.52 42.80 38.65 49.54 61.88 46.30 74.10 48.63 63.45 44.45 36.77 71.96 77.79 42.13 63.24 67.56 74.44 31.77 76.91 73.04 79.92 67.10 78.13 37.95 45.60 68.88 54.47 43.47 54.57 76.12 80.45 38.08 57.21 54.28 a. Give the 85% confidence interval. Label everything with letters and write the interval as an inequality. b. Statistical Interpretation c. Real World Interpretation
The average monthly cell phone bill was reported last year to be $53.88 by the U.S. Wireless Industry. Random sampling of a large cell phone company found the current monthly cell phone charges (in dollars) in the table on the left. At the 0.05 level of significance, can it be concluded that the average cell phone bill has increased? Also find an 85% confidence
table:
55.83
60.47
58.60
49.88
52.45
51.26
32.98
49.20
70.42
50.02
75.04
41.88
35.00
61.58
58.99
61.25
62.00
80.21
73.60
71.52
42.80
38.65
49.54
61.88
46.30
74.10
48.63
63.45
44.45
36.77
71.96
77.79
42.13
63.24
67.56
74.44
31.77
76.91
73.04
79.92
67.10
78.13
37.95
45.60
68.88
54.47
43.47
54.57
76.12
80.45
38.08
57.21
54.28
a. Give the 85% confidence interval. Label everything with letters and write the interval as an inequality.
b. Statistical Interpretation
c. Real World Interpretation
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 3 images
