{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Examples of Problems Requiring Sampling Distributions

# Examples of Problems Requiring Sampling Distributions -...

This preview shows pages 1–5. Sign up to view the full content.

A consumer survey indicates that the average household spends u=\$155.00 on groceries each week. The distribution of spending amounts is approximately normal with a standard deviation (sigma) = \$25.00. Based on this distribution: a) What proportion of the population spends more than \$175.00 per week in groceries? b) What is the probability of randomly sampling a family that spends less than \$130.00/week? c) What is the probability that a random sample of 16 families spends less than 130.00 a week?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
-2- IQ’s of the population of high school students have a mean of 100 and a standard deviation of 15. a) What is the probability of randomly picking a student at a nearby high school who has an IQ of 107? b) What is the probability of finding a random sample of 49 high school students who have an average IQ of 107?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: -3-The standard deviation of a population of scores helps us locate that score in a normal distribution of scores and helps us to determine the probability of randomly sampling a particular score. The standard error of the mean of a particular sampling distribution of means helps us to locate a sample mean in that distribution and helps us to determine the probability of that sample mean.-4-What is the probability of randomly selecting a sample of 4 students with an average IQ of 107? What is the probability of randomly selecting a sample of 9 students with an average IQ of 107? What is the probability of selecting a sample of 16 students with an average IQ of 107? What is the probability of selecting a sample of 25 students with an average IQ of 107? A random sample of 36 students?...
View Full Document

{[ snackBarMessage ]}

### Page1 / 5

Examples of Problems Requiring Sampling Distributions -...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online