# Question

A sample of 213 newspaper tire ads from several Sunday papers showed that 98 contained a low-price guarantee (offer to "meet or beat any price").

(a) Assuming that this was a random sample, construct a 95 percent confidence interval for the proportion of all Sunday newspaper tire ads that contain a low-price guarantee.

(b) Is the criterion for normality of p met?

(a) Assuming that this was a random sample, construct a 95 percent confidence interval for the proportion of all Sunday newspaper tire ads that contain a low-price guarantee.

(b) Is the criterion for normality of p met?

## Answer to relevant Questions

A physician's billing office conducted a random check of patient records and found that 36 of 50 patients had changed insurance plans within the past year. Construct a 90 percent confidence interval for the true proportion. A sample of 40 CDs from a student's collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes. Construct a 95 percent confidence interval for the population standard deviation. (Data are ...A certain brand of at white interior latex paint claims one-coat coverage of 400 square feet per gallon. The standard deviation is known to be 20. A sample of 16 gallons is tested. (a) At α = .05 in a left-tailed test, find ...Find the z calc test statistic for each hypothesis test. a. x-bar = 423, μ0 = 420, σ = 6, n = 9 b. x-bar = 8330, μ0 = 8,344, σ = 48, n = 36 c. x-bar = 3.102, μ0 = 3.110, σ = .250, n = 25 The Scottsdale re department aims to respond to recalls in 4 minutes or less, on average. Response times are normally distributed with a standard deviation of 1 minute. Would a sample of 18 re calls with a mean response time ...Post your question

0