In a population of high school boys, the mean number of girls dated over a four year period is 19.6, with a standard deviation of 4.5. What is the probability that, in a sample of N = 100, the observed sample mean would be 20.5 or more? In a sample of N = 100, what is the probability of observing a sample mean that is less than 18.25? In a sample of N = 100, what is the probability of observing a sample mean between 19 and 20?
In a population of high school boys, the mean number of girls dated over a four year period is 19.6, with a standard deviation of 4.5. What is the probability that, in a sample of N = 100, the observed sample mean would be 20.5 or more? In a sample of N = 100, what is the probability of observing a sample mean that is less than 18.25? In a sample of N = 100, what is the probability of observing a sample mean between 19 and 20?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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In a population of high school boys, the mean number of girls dated over a four year period is 19.6, with a standard deviation of 4.5.
- What is the probability that, in a sample of N = 100, the observed sample mean would be 20.5 or more?
- In a sample of N = 100, what is the probability of observing a sample mean that is less than 18.25?
- In a sample of N = 100, what is the probability of observing a sample mean between 19 and 20?
Fifty individuals are randomly selected from a population. It is known that, in the population, 5% of all individuals are not going to vote in the next election. Assuming that the percent of nonvoting individuals may be approximated by the
- What is the probability that 8% or less of the 50 sampled individuals will not vote?
- What is the probability that between 4% and 10% of the sampled individuals will note vote?
- What is the probability that more than 12% of the people in the sample will not vote in the next election?
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