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You've administered a standardized test of manual dexterity to two groups of 10 semi skilled workers. One of these two groups of workers will be employed by you to work in a warehouse with many fragile items. The higher the manual dexterity of a worker the less likelihood that worker will break significant inventory. Because of a unique contract you must hire all 10 employees from one of the two groups and none of the employees from the other.
Group A Scores 77 87 80 91 77 84 90 60 79 66
Group B Scores 100 99 62 57 95 96 69 32 83 98
You must decide which group to choose. Consider at least two measures of central tendency and at least one measure of dispersion for each group and use those to make your choice. Be sure to justify your choice with at least one page of discussion and analysis. Can you base a decision on the information provided and the measures that you calculated only?
Write out the multiple regression equation using the given data.
Calculate the value of chi-square. What is your decision regarding H 0 ?
A research report summarizes the results of the hypothesis test by stating,"z = 2.13, p
Provided that the selected student excels in sports, determine the probability that the student is a boy?
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
Researchers at a pharmaceutical company have found that the effective time duration of a safe dosage of a pain relief drug is normally distributed with mean 2 hours and standard deviation 0.3 hour.
The null hypothesis is to be tested at the 10% level of significance. The critical value from the table is:
Determine the probability that a randomly selected sample of 31 patients would produce an average diameter of 6.6 mm or less for the non affected tendon?
According to the retail electronics chain, adults in 40 to 50 year old age group, the mean amount spent per year on electronics is $1998.
Suppose that the number of babies born during an hour at a hospital's maternity wing follows a Poisson distribution with a mean of 4 per hour.
Suppose among 312 large city residents sampled, 65 refused to cooperate. What is the margin of error at the 95% confidence level.
In multi-choice test, each question has four options. Students wil get 10 points for each correct answer; lose four points for each incorrect answer; and receive no points for unanswered questions.
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