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Questions 10–11. Suppose the mean weekly income of students working in Toronto is u with a standard deviation of o. Two independent random samples, each of size 50, is selected to estimate u . Denote the sample means by X1 and X2. 10. The probability P(X1– X2 > 0.50) is closest to (a) 0.0228 V(b) 0.0062 (c) 0.4772 (d) 0.4938 (e) 0.6145

Questions 10–11. Suppose the mean weekly income of students working in Toronto is u with a standard deviation of o. Two independent random samples, each of size 50, is selected to estimate u . Denote the sample means by X1 and X2. 10. The probability P(X1– X2 > 0.50) is closest to (a) 0.0228 V(b) 0.0062 (c) 0.4772 (d) 0.4938 (e) 0.6145

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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Questions 10–11. Suppose the mean weekly income of students working in Toronto is u with a standard deviation of o. Two independent random samples, each of size 50, is selected to estimate u . Denote the sample means by X1 and X2 . 10. The probability P(X1 - X2 > 0.50) is closest to (a) 0.0228 V(b) 0.0062 (c) 0.4772 (d) 0.4938 (e) 0.6145 11. If o =20, which one of the following has approximately a standard normal distribution? (b) – (x - x3) (a) X2 (d) (e)
Transcribed Image Text:Questions 10–11. Suppose the mean weekly income of students working in Toronto is u with a standard deviation of o. Two independent random samples, each of size 50, is selected to estimate u . Denote the sample means by X1 and X2 . 10. The probability P(X1 - X2 > 0.50) is closest to (a) 0.0228 V(b) 0.0062 (c) 0.4772 (d) 0.4938 (e) 0.6145 11. If o =20, which one of the following has approximately a standard normal distribution? (b) – (x - x3) (a) X2 (d) (e)
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