Confidence interval for the population mean is between: _________? 0.00 Upper li

Question

Confidence interval for the population mean is between: _________?

0.00

Upper limit

Standard deviation Known Sample Size Confidence level 20 100 Mean Margin of error Intervals 0.00 Lower limit Amount Spent 95 98 42 32 88 124 89 111 112 120 116 107 41 101 71 110 61 102 42 91 77 40 124 27 59 67 86 120 121 125 86 70 81 42 112 29 66 57 120 92 75 81 97 81 41 107 108 60 75 34 56 72 77 76 55 67 92 69 86 77 107 58 29 107 30 43 82 37 70 41 115 96 74 106 100 97 98 89 104 101 116 102 63 29 106 116 122 75 121 29 81 96 67 62 28 96 108 82 70 63

0.00

Upper limit

Explanation / Answer

Sample average is 80.56

Known devition is 20

Sample size is 100

Confidence interval is : Xbar +/- Z95*Sigma/sqrt(n)

80.56 +/- 1.96*20/sqrt(100)

=76.65 to 84.48

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