Assignment 7.docx

# Assignment 7.docx - 4.1 The Minitab output for a random...

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4.1 The Minitab output for a random sample of data is shown below. Some of the quantities are missing. Compute the values of the missing quantities. Variable N Mean SE Mean StDev Variance Min. Max. X 9 19.96 ? 3.12 ? 15.94 27.16 SE Mean: s n SE Mean: 3.12 9 = 1.04 Variance: s 2 = 3.12 2 = 9.7344 4.2 The Minitab output for a random sample of data is shown below. Some of the quantities are missing. Compute the values of the missing quantities. Variable N Mean Variance Sum Sum of squares Min. Max. X 10 ? ? 109.891 1258.889 6.451 13.878 Mean = ´ x = i = 1 n x i n Mean = ´ x = 109.891 10 = 10.9891

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Variance = i = 1 n x i ¿ 2 ¿ ¿ n ¿ i = 1 n x i 2 ¿ s 2 = ¿ Variance = 109.891 ¿ 2 ¿ ¿ 10 ¿ 1258.899 ¿ s 2 = ¿ = 5.6995 4.4 The Minitab output for a random sample of data is shown below. Some of the quantities are missing. Compute the values of the missing quantities. Variable N Mean Variance Sum Sum of squares Min. Max. SE Mean X 15 ? ? 2977.70 592,589.6 4 181.90 212.62 ? Mean = ´ x = i = 1 n x i n Mean = ´ x = 2977.70 15 = 198.5133
Variance = i = 1 n x i ¿ 2 ¿ ¿ n ¿ i = 1 n x i 2 ¿ s 2 = ¿ Variance = 2977.70 ¿ 2 ¿ ¿ 10 ¿ 592,589.64 ¿ s 2 = ¿ = 105.4634

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