8. A fast food restaurant estimates that the mean sodium content in one of its breakfast sandwiches is no more that 920 milligrams. A random sample of 44 breakfast sandwiches has a mean sodium content of 925 milligrams. Assume the population standard deviation is 18 milligrams. At = 0.10, do you have enough evidence to reject the restaurant's claim?

a) The sample mean is 925 milligrams. Before doing any work, do you think that is far enough above 920 to suggest that the sandwiches have more than 920 milligrams of sodium, ON AVERAGE?

b) Perform the hypothesis test.

c) State the conclusion clearly and compare with your guess in part a.