Can you answer these questions :)

A marketing research company employs a large number of typists to enter data into a computer database. The time taken for new typists to learn the computer system is known to have a Normal distribution with a mean of 130 minutes and a standard deviation of 20 minutes. A candidate is automatically hired if he or she learns the computer system in less than 100 minutes. A cutoff time is set at the slowest 40% of the learning distribution. Anyone slower than this cutoff time is not hired. Find the proportion of new typists that take under 170 minutes but no less than 110 minutes to learn the computer system. Select one: Select one: Q a. about 68%. O b. about 82%. O c. about 50% 0 d. about 99.7%. 0 9. about 95%. An administrator wanted to study the utilization of longdistance telephone service by a department. One variable of interest (let's call it X) is the length, in minutes, of longdistance calls made during one month. There were 38 calls that resulted in a connection. The length of calls, already ordered from smallest to largest, are presented in the following table. 4.5 4.5 5.9 7.1 7.4 7.5 7.7 8.6 12.7 15.3 15.5 15.9 15.9 16.1 16.5 17.3 17.5 19.0 -------- Which one of the following statements is not true? Select one: Q a. The percentile rank of 53.3 minutes is 100%. O b. X35 = 32.8 minutes is not an outlier in X distribution. 0 c. The second Decile is 3 minutes. Q d. Let Y = X + 9, then Y distribution is positively skewed. 0 e. The mode of X distribution is 1.8 minutes