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# My first free question: The table below displays information collected from a survey of students at a MBA program with a population size of 1000...

"Hi
Last night I post my 3 free questions( just only 3)
But you sent to me e-mail and explained that we can answer 3 question per day.
Anyway, for today i attached my 3 free question here

PS: it could be 2 post but both of them are same. 2 minutes ago I posted same
thank you very much"
My first free question: The table below displays information collected from a survey of students at a MBA program with a population size of 1000 students. MBA Student Survey Gender Average of Female Male Grand Total Nights out/week 1.85 1.88 1.87 Study hours/week 18.50 17.8 0 18.03 Number of International Students International Student Gender No Yes Grand Total Female 5 5 10 Male 15 5 20 Grand Total 20 10 30 Number of Students Gender Undergraduate concentration Female Male Grand Total Business 2 5 7 Engineering 3 6 9 Liberal Arts 1 5 6 Other 1 3 4 Sciences 3 1 4 Grand Total 10 20 30 a) Can you detect any problems with the sample that was surveyed? If yes, what are those problems? If no, why not? b) Would you want to use this sample to make inferences about the population? Why or why not? Second Free Question:. In determining automobile mileage ratings in the United States, it was found that miles-per-gallon (mpg) in American cities is normally distributed with a mean of 24 mpg and a standard deviation of 1.0 mpg. Find the following: a) P(mpg < 25) b) P(23 < mpg < 25) c) P(mpg > 26) 1
Third Free Question: The table below provides statistics and all relevant information for calculating confidence intervals in a sample of 100 employees in a firm on employees’ current salary (in dollars), beginning salary (in dollars), previous experience (in months) when hired, and education (in years). a) Calculate the margin of error for each variable. b) Assume the population standard deviation for current salary is \$15,000. What is the confidence level we applied to compute the confidence interval for current salary as shown above? Give the value of the percentage of that confidence level. Previous Current Beginning Experience Education Salary Salary (months) (years) Sample Standard Deviation \$17,290 \$8,348 105 2.72 Sample Mean \$33,633 \$16,939 96 13 Sample Size 100 Confidence Interval Interval Lower Limit \$30,202 \$15,282 75 12.68 Interval Upper Limit \$37,063 \$18,595 117 13.76 2

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