QI: The number of e-mail messages received per hour has the following distribution: Xnumber of messages I1 12 13 14 15 10 0.08 0.15 0.30 0.20 0.20 0.07 (a) Find P(x > 11), P(xS 12), P(14 SxS 16) (b) Determine the mean and standard deviation of the number of messages received per hour. (c) Suppose that each e-mail message header reserves 15 kilobytes of memory space for storage. Let the random variable Y denote the memory space reserved for all message headers per hour (in kilobytes). Determine the mean and standard deviation of Y.
QI: The number of e-mail messages received per hour has the following distribution: Xnumber of messages I1 12 13 14 15 10 0.08 0.15 0.30 0.20 0.20 0.07 (a) Find P(x > 11), P(xS 12), P(14 SxS 16) (b) Determine the mean and standard deviation of the number of messages received per hour. (c) Suppose that each e-mail message header reserves 15 kilobytes of memory space for storage. Let the random variable Y denote the memory space reserved for all message headers per hour (in kilobytes). Determine the mean and standard deviation of Y.
MATLAB: An Introduction with Applications
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
Transcribed Image Text:QI: The number of e-mail messages received per hour has the following distribution:
x= number of messages
10
11 12 13 14 15
0.08 0.15 0.30 0.20 0.20 0.07
(a) Find P(x > 11), P(x< 12), P(14 Sx<16)
(b) Determine the mean and standard deviation of the number of messages received per hour.
(c) Suppose that each e-mail message header reserves 15 kilobytes of memory space for storage.
Let the random variable Y denote the memory space reserved for all message headers per hour
(in kilobytes). Determine the mean and standard deviation of Y.
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