# Part d why is the exponential probability

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Part DWhy is the exponential probability distribution called memoryless? Compare your answers for (5a) and (5c).Problem 5 continued on next page. . .8
Josh DavisStat330 (Mr. Lanker Section A): Homework #5Problem 5 (continued)Solution
Problem 6Problem 4.16 from Baron.For the Standard Normal random variableZ, compute the values of the following.
(b)P(Z1.25) = 0.8944(c)P(Z >1.
(d)P(|Z| ≤1.
(g) With probability 0.8, variableZdoes not exceed what value?
Problem 7Problem 4.17 from Baron.For the Standard Normal random variableZ, compute the values of the following.
(b)P(Z≤ -0.99) =
(c)P(Z <0.99) = 0
(g) With probability 0.9, variableZis less than what?
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Josh DavisStat330 (Mr. Lanker Section A): Homework #5Problem 8Problem 8IfXis a continuous random variable that follows a normal probability distribution withμ= 100 points andσ= 15, then find the probability thatXis:Part ALess than 106.
Problem 8 continued on next page. . .10
Josh DavisStat330 (Mr. Lanker Section A): Homework #5Problem 8 (continued)Part DFind the point value that separates the lower half and upper half of values ofX, or the median valuecwhereP(X < c) = 0.50.
Part EFind the point value that separates the lower quarter from the upper three quarters of values ofX, or whereP(X < c) = 0.25.
Part FFind the point value that separates the lower three quarters from the upper quarter of values ofX, or whereP(X < c) = 0.75.
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Josh DavisStat330 (Mr. Lanker Section A): Homework #5
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