A physician tells you the largest typical hemoglobin value is 13.5 and the smallest is 9.5 mg/L. A reasonable estimate of the standard deviation is: XXXXXXXXXX (2) 1.0 (3) 4.0 (4) unknowable with this...

A physician tells you the largest typical hemoglobin value is 13.5 and the smallest is 9.5 mg/L. A reasonable estimate of the standard deviation is:

(1) 11.5

(2) 1.0

(3) 4.0

(4) unknowable with this information

 On ten days, a bank had 18, 15, 13, 12, 8, 3, 7, 14, 16, and 3 bad checks. Find the mean, median, variance, and standard deviation of the number of bad checks.