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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Get started for freeDefine the random variable .
X ~ _____(_____,_____)
Use the following information to answer the next five exercises: Suppose that a group of statistics students is divided into two groups: business majors and non-business majors. There are business majors in the group and seven non-business majors in the group. A random sample of nine students is taken. We are interested in the number of business majors in the sample.
What values does take on?
What values does X take on?
A hospital researcher is interested in the number of times the average post-op patient will ring the nurse during a 12-hour shift. For a random sample of 50 patients, the following information was obtained. Let X = the number of times a patient rings the nurse during a 12-hour shift. For this exercise, x = 0, 1, 2, 3, 4, 5. P(x) = the probability that X takes on value x. Why is this a discrete probability distribution function (two reasons)?
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