p.410 #1 A hat company claims that the mean hat size for a male is at least 7.25. A random sample of 12 hat sizes has a mean of 7.15. At a = 0.01, can you reject the company’s claim? Assume the population is normally distributed and the population standard deviation is 0.27.
p.411 #1 A coffee shop owner claims that than 80% of coffee drinkers think that the taste of shop’s coffee is very important in determining where they purchase their coffee. In a random sample of 36 coffee drinkers, 78% think that the taste of a shop’s coffee is very important in determining where they purchase their coffee. At a = 0.10, is there enough evidence to support the owner’s claim.