What is the mean of the wholesaler's monthly sales?

What is the mean of the wholesaler's monthly sales?

A) 326,400
B) 135,620
C) 132,840
D) 163,200

Q. 2

For two independent random variables X and Y, which of the following identities is always true?

A) E(2X + 3Y) = E(X) + E(Y) + 5
B) Var(2X + 3Y) =2Var(X) + 3Var(Y)
C) Var(2X + 3Y) = 4Var(X) + 9Var(Y)
D) E(2X + 3Y) = 5E(X+Y)

Q. 3

The interquartile range is the average of the first and third quartiles.

Indicate whether the statement is true or false

Q. 4

Discuss briefly the difference between descriptive and inferential statistics.

What will be an ideal response?

Q. 5

If a sample of size 120 is selected, the value of A for the probability P(-A t

A) = 0.98 is:
A) 1.960
B) 2.576
C) 1.282
D) 2.326

Q. 6

The median score for the final exam in a statistics class was 85 and 20 percent of the students received a grade greater than 90. What is the probability that a randomly selected exam had a score between 85 and 90?

A) 80 percent
B) 30 percent
C) 50 percent
D) There is not sufficient information to answer this question.

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What is the mean of the wholesaler's monthly sales?

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