A small engine shop receives an average of 1.7 repair calls an hour, with standard deviation of 0.6? -

what is the mean?what is the standard deviation of the number of calls they recieve for an 8 hour day?What if anything did u assume?

The Mean is your average, and the standard deviation is listed...the SD means it can vary between 1.1 and 2.3 calls/hour. ( think of a poll.. where they say their accuracy is + or - a certain point value. That point value is your SD)...I assumed nothing, as those are facts that can be deduced from the data listed...