A survey of American Society of Investors found 30% of individual investors have

ID: 3442473 • Letter: A

Question

A survey of American Society of Investors found 30% of individual investors have used a discount broker.

In a random sample of nine individuals, what is the probability:

a. Exactly two of the sample individuals have used a discount broker? P(x = 2)

Enter answers to 4 decimal places with 0 to the left of the decimal point.

b. None of the 9 individuals have used a discount broker. P(X = 0)

Enter answers to 4 decimal places with 0 to the left of the decimal point.

c. Two or three individuals have used a discount broker. P( 2 <= X <= 3)

Enter answers to 4 decimal places with 0 to the left of the decimal point.

d. What is the mean and standard deviation for this distribution?

Enter each answer to 2 decimal places.

A survey of American Society of Investors found 30% of individual investors have

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