a) Compute E(X) and V (X). b) Compute the expected number of pounds left after the next customer's order is shipped and the variance of the number of pounds left.

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.
Chapter2: Exponential, Logarithmic, And Trigonometric Functions
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A chemical supply company currently has in
stock 100 lb of a certain chemical, which it sells
to customers in 5-lb lots. Let X = the number of
lots ordered by a randomly chosen customer, and
suppose that X has pmf
1
2
3
4
p(x)| 0.2
0.4
0.3
0.1
a) Compute E(X) and V (X).
b) Compute the expected number of pounds left after
the next customer's order is shipped and the
variance of the number of pounds left.
STAT310L Drob
Transcribed Image Text:A chemical supply company currently has in stock 100 lb of a certain chemical, which it sells to customers in 5-lb lots. Let X = the number of lots ordered by a randomly chosen customer, and suppose that X has pmf 1 2 3 4 p(x)| 0.2 0.4 0.3 0.1 a) Compute E(X) and V (X). b) Compute the expected number of pounds left after the next customer's order is shipped and the variance of the number of pounds left. STAT310L Drob
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