#1 for the month of April, a checking account balance of $545 for 22 days, $2377 for 3 days and $297 for 5 days. What is the accounts mean daily balance for April ? #2 the gas mileage (in miles per gallon) for 32 car are shown in frequency distribution. Approximate the mean of the frequency distribution. Gas mileage Frequency 27-32 12 33-38. 11 39-44 2 45-50. 7 #3 what's the variance and standard deviation of the sample? 12, 20, 23, 14, 14, 18, 21 17, 14, 16