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Seventy new jobs are opening up at an automobile manufacturing plant, and 1000 applicants show up for the 70 positions. To select the best 70 from among the applicants, the company gives a test that covers mechanical skill, manual dexterity, and mathematical ability. The mean grade on this test turns out to be 60, and the scores have a standard deviation of 6. Can a person who scores 84 count on getting one of the jobs? Assume that the distribution is symmetric about the mean. Explain your work.
Several factors influence the value obtained for a t statistic. Some factors affect the numerator of the t statistic and others influence the size of estimated standard error in the denominator.
A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error?
Draw ogives from the following data and measure the median value and compute the value of arithmetic mean
A trucking firm suspects that the mean lifetime of a certain tire it uses is less than 35000 miles. To check the claim the firm randomly selects and test 54 of these tires and gets a mean lifetime of 34,570
Does this mean immigrants tend to earn more than other people? Or does it mean immigrants improve a state's economy? If not, what could explain the correlation?
What is the value of the population mean? What is the best estimate of this value?
Describe the Linear programming problem with constraints. Which among the following is not acceptable as a constraint in a linear programming problem?
Create the 90% confidence interval for difference in average damage amount for two kinds of SUVs. Interpret this interval.
The interval 6 to 12 pounds. find the probability that a person on this diet losses more than 11 pounds in the first two months.
Do the data indicate that the sleeping pill is effective at a 1% level of significance?
Standard deviation of 100. The top 3% of students receieve $500. What is the minimum score you would need to receive this money? Calculate the z-score.
Write out the multiple regression equation using the given data.
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