Question 1
Solve the problem.
Among a random sample of 250 college students, the mean number of hours worked per week at non-college related jobs is 14.2. This mean lies 2 standard deviation(s) above the mean of the sampling distribution. If a second sample of 250 students is selected, what is the probability that for the second sample, the mean number of hours worked will be greater than 14.2?
◦ 0.0222
◦ 0.9772
◦ 0.5
◦ 0.0228
Question 2
Solve the problem.
Among a random sample of 400 college students, the mean number of hours worked per week at non-college related jobs is 14.4. This mean lies 2.8 standard deviation(s) above the mean of the sampling distribution. If a second sample of 400 students is selected, what is the probability that for the second sample, the mean number of hours worked will be less than 14.4?
◦ 0.0026
◦ 0.9965
◦ 0.5
◦ 0.9974
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