An Electronics Retailer Believes That,at Most,40% of Their Cell Phone

Multiple Choice

An electronics retailer believes that,at most,40% of their cell phone inventory was sold during November. The retailer surveyed 80 dealers and found that 38% of the inventory was sold. Since 38% is less than 40%,is this difference of 2 percentage points sampling error or a significant difference? Test at the 0.05 level. The computed z = −0.37.

A) The 2% is a significant difference.
B) We cannot determine if the 2% is a significant difference.
C) There is not enough information to reach a conclusion.
D) None of the other answers apply.