Harper's Index reported that 80% of all supermarket prices end in the digit 9 or 5. Suppose you check a random sample of 111 items in a supermarket and find that 83 have prices that end in 9 or 5. Does this indicate that fewer than 80% of the prices in the store end in the digits 9 or 5? Use = 0.05. A button hyperlink to the SALT program that reads: Use SALT. (a) What is the level of significance