Question
Suppose we have a large population of houses in a community. The average annual heating expense for each house is $400 with a population standard
Suppose we have a large population of houses in a community. The average annual heating expense for each house is $400 with a population standard deviation of $25. A random sample of 25 houses had a sample mean of $380 and a sample standard deviation of $35.
- . What is the mean of the sampling distribution of the sample mean for samples of size 25 chosen from the population of all houses?
- What is the standard deviation of the sample distribution of the sample mean for samples of size 25 chosen from the population of all houses?
- Is it safe to assume that the sampling distribution of the sample mean for samples of size is normally distributed? Why or why not?
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Calculus Early Transcendentals Early Transcendentals
Authors: Dennis G Zill, Warren S Wright
4th Edition
0763797375, 9780763797379
