Chapter 4: Q. 73 (page 288)
Complete the PDF and answer the questions.
a. Find the probability that
b. Find the expected value.
Short Answer
(a) .
(b) The expected value is.
Chapter 4: Q. 73 (page 288)
Complete the PDF and answer the questions.
a. Find the probability that
b. Find the expected value.
(a) .
(b) The expected value is.
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What is the probability of getting customers in one day?
= _______
Jeremiah has basketball practice two days a week. Ninety percent of the time, he attends both practices. Eight percent of the time, he attends one practice. Two percent of the time, he does not attend either practice. What is X and what values does it take on?
A bag contains letter tiles. Forty-four of the tiles are vowels, and are consonants. Seven tiles are picked at random. You want to know the probability that four of the seven tiles are vowels. What is the group of interest, the size of the group of interest, and the size of the sample?
It has been estimated that only about 30% of California residents have adequate earthquake supplies. Suppose we are interested in the number of California residents we must survey until we find a resident who does not have adequate earthquake supplies.
a. In words, define the random variable X.
b. List the values that X may take on.
c. Give the distribution of X. X ~ _____(_____,_____)
d. What is the probability that we must survey just one or two residents until we find a California resident who does not have adequate earthquake supplies?
e. What is the probability that we must survey at least three California residents until we find a California resident who does not have adequate earthquake supplies?
f. How many California residents do you expect to need to survey until you find a California resident who does not have adequate earthquake supplies?
g. How many California residents do you expect to need to survey until you find a California resident who does have adequate earthquake supplies?
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