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95% Confidence Interval Interpretation

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Using Sample "A" Construct, (Explain and Interpret in full detail) a 90% and a 95% confidence interval for the mean of all stocks in the index based on this sample of 50 stock prices:
36.18
30.92
51.7
38.07
27.87
37.11
82.85
18.74
41.86
246.94
11.55
12
25.5
44.37
34.19
24.29
24.31
39.43
18.9
195.01
91.3
31.87
26.46
42.3
51.79
13.84
24.58
76.48
64.81
41.65
26.02
67.97
36.19
27.08
33.86
32.77
49.42
23.18
49.18
15.24
34.76
61.94
69.7
6.14
24.69
33.5
57.91
100.21
55.05
17.96
30.93

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