# Question

A sample of 50 homes in a subdivision revealed that 24 were ranch style (as opposed to colonial, tri-level, or Cape Cod). (a) Construct a 95 percent confidence interval for the true proportion of ranch style homes. (b) Check the normality assumption of p. 8.37 In a grocery parking lot, 32 of 136 cars selected at random were white.

(a) Construct a 99 percent confidence interval for the true proportion of white cars.

(b) May normality of p be assumed? Explain.

(a) Construct a 99 percent confidence interval for the true proportion of white cars.

(b) May normality of p be assumed? Explain.

## Answer to relevant Questions

In a grocery parking lot, 32 of 136 cars selected at random were white. (a) Construct a 99 percent confidence interval for the true proportion of white cars. (b) May normality of p be assumed? Explain. A random survey of 500 students was conducted from a population of 2,300 students to estimate the proportion who had part-time jobs. The sample showed that 245 had part-time jobs. Calculate the 90 percent confidence interval ...The city fuel economy of a 2009 Toyota 4Runner 2WD 6 cylinder 4 L automatic 5-speed using regular gas is a normally distributed random variable with a range 16 MPG to 21 MPG. (a) Estimate the standard deviation using Method ...Find the 95 percent confidence interval for the population variance from these samples. a. n = 15 commuters, s = 10 miles driven b. n = 18 students, s = 12 study hours A sample of 20 pages was taken without replacement from a Yellow Pages directory that has 1,591 pages. (a) Calculate the FPCF for this sample. (b) Should the population be considered effectively in finite?Post your question

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