A sample of 213 newspaper tire ads from several Sunday papers showed that 98 contained a lowprice guarantee (offer to “meet or beat any price”). (a) Assuming that this was a random sample, construct a...

A sample of 213 newspaper tire ads from several Sunday papers showed that 98 contained a lowprice 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 met? (See The New York Times, January 11, 2007, p. C3.)