Chapter 7: Q.28 (page 429)
What three things must you know about distribution to find the probability of sums?
Short Answer
We must know: mean, standard deviation and sample size of the distribution.
Chapter 7: Q.28 (page 429)
What three things must you know about distribution to find the probability of sums?
We must know: mean, standard deviation and sample size of the distribution.
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Complete the distributions.
a. _____(_____,_____)
b. role="math" localid="1648618952256" _____(_____,_____)
A uniform distribution has a minimum of six and a maximum of ten. A sample of is taken.
Find the th percentile for the sums.
Use the following information to answer the next six exercises: Yoonie is a personnel manager in a large corporation. Each month she must review 16 of the employees. From past experience, she has found that the reviews take her approximately four hours each to do with a population standard deviation of hours. Let be the random variable representing the time it takes her to complete one review. Assume is normally distributed. Let be the random variable representing the mean time to complete the 16 reviews. Assume that the 16 reviews represent a random set of reviews.
1. What is the mean, standard deviation, and sample size?
Find the sum that is standard deviations below the mean of the sums.
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