Please answer each question in complete paragraph. Do not repeat the questions. All answers should be followed by a reference
The mean monthly household electric bill in the United States was $148.76 with standard deviation $20.87. Assume the amounts are normally distributed.
The mean monthly household electric bill in the United States was $148.76 with standard deviation $20.87. Assume the amounts are normally distributed. Between what two amounts are the middle 89% of the electric bills? The middle 89% of the electric bills are between $ and $ . Round to the nearest cent. Send