The table below shows the number of one company's stores located in each of 50 regions. Complete parts (a) through (c) below. 61 25 76 54 569 80 67 17 15 310 0 125 21 27 193 127 66 58 77 81 35 95 117 155 81 48 100 26 33 45 35 160 45 345 140 5 205 56 67 233 23 65 25 89 409 40 19 140 111 35 100 a. Compute the mean, variance, and standard deviation for this population. The population mean is p = (Type an integer or a decimal. Round to one decimal place as needed ) The population variance is of = [ ]. (Round to the nearest integer as needed.) NOTE. To calculate the variance, do not round standard deviation value. This is to avoid the rounding error. The population standard deviation is a =]. (Type an integer or a decimal Round to one decimal place as needed ) b. What percentage of the 50 regions have stores within 1, $2, or + 3 standard deviations of the mean? The percentage within # 1 standard deviation of the mean is |%. "Type an integer or a decimal Do not round ) The percentage within #2 standard deviations of the mean is 9%. (Type an integer or a decimal Do not round ) The percentage within 3 standard deviations of the mean is| |%