A survey of 25 randomly selected customers found the ages shown (in years). The mean is 22.60 years and the standard deviation is 10.02 years. 22 44 46 32 160 a) How many degrees of freedom does the I-statistic have? 33 30 38 27 23 by How many degrees of freedom would the t-statistic have if the sample size had been 4007 38 35 32 22 15 39 24 47 38 22 45 22 35 49 43