2. Find the standard deviation for the data shown in the table of problem #6.3. Use your answer from problems #6 and #7 to answer the following questions:
a. What percent of the data is within 1 standard deviation of the mean?
b. What percent of the data is within 3 standard deviations of the mean?
4. The average resident of a certain East Coast suburb spends 42 minutes per day commuting, with a standard deviation of 12 minutes. Assume a normal distribution. Find the percent of all residents of this suburb who commute no more than 35 minutes per day.
(Please see the attached file)
A Complete, Neat and Step-by-step Solution is provided in the attached file