In the following probability distribution, the random variable x represents the number of activities a parent of a K to 5th-grade student is involved in. Complete parts (a) through (f) below. 1 2 3 4 P(x) 0.241 0.377 0.255 0.063 0.064 .. U I I v p v Iv v . ... I .v v OC. The observed value of an experiment will be equal to the mean of the random variable in most experiments. O D. As the number of experiments decreases, the mean of the observations will approach the mean of the random variable. (d) Compute the standard deviation of the random variable x. The standard deviation is activities. (Round to one decimal place as needed.) (e) What is the probability that a randomly selected student has a parent involved in three activities? The probability is. (Type an integer or a decimal. Do not round.) (f) What is the probability that a randomly selected student has a parent involved in three or four activities? The probability is U. (Type an integer or a decimal. Do not round.)

In the following probability distribution, the random variable x represents the number of activities a parent of a K to 5th-grade student is involved in. Complete parts (a) through (f) below. 1 2 3 4 P(x) 0.241 0.377 0.255 0.063 0.064 .. U I I v p v Iv v . ... I .v v OC. The observed value of an experiment will be equal to the mean of the random variable in most experiments. O D. As the number of experiments decreases, the mean of the observations will approach the mean of the random variable. (d) Compute the standard deviation of the random variable x. The standard deviation is activities. (Round to one decimal place as needed.) (e) What is the probability that a randomly selected student has a parent involved in three activities? The probability is. (Type an integer or a decimal. Do not round.) (f) What is the probability that a randomly selected student has a parent involved in three or four activities? The probability is U. (Type an integer or a decimal. Do not round.)

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.

Chapter12: Probability

Section12.4: Discrete Random Variables; Applications To Decision Making

Problem 2E

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