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The Army gives a battery of exams to all new recruits. One exam measures a person's ability to work with technical machinery. This exam was given to a random sample of 360 recruits. In the table below x = score ont the test and f is the frequency of new recruits with score x.
x 1 2 3 4 5 6 7 8 8 10f 28 42 79 83 51 36 18 12 7 4
A) Find the probability distribution of these scores.
B) The ground-to-air missle battalion needs people with a score of 7 or higher on the exam. What is the probability that a new recruit will meet that criteria?
C) Compute the expected value of these scores.
D) Compute the standard deviation of these scores.
You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At α = 0.01, do you have enough evidence to support the repairer's claim?
According to Bienayme-Chebyshev rule, what percentages of these funds are likely to be within ±2 standard deviation of mean?
The average weight of adult men is 172 pounds with a standard deviation of 29 pounds. 30 men were asked their weight and the mean was calculated to be 181, test the hypothesis that the mean is not 172 pounds using alpha = .05.
10 people taste wine A and wine B, X= denote the number prefer A. Assume that all others prefer B. These people random sample..
Identify at least 2 variables for which you would utilize a repeated-measures ANOVA in your analysis. Describe the variables and their scale of measurement.
Two chi-square distributions were plotted on the same chart. One distribution was for 3 degrees of freedom and the other was for 12 degrees of freedom. Which distribution would tend to approach a normal distribution?
What type of graph would you use to represent the data and why? Focus on finding relevant, personally meaningful material to work with for these students.
If, 20 patients improved, 7 declined, and 3 remained the same, assess whether or not patients undergoing this treatment are showing significant change from baseline to 3 months afterward. Report a p-value.
I believe this can be done by plotting out every 3 years average number of people working past 65 since 1997 until now and then making a predictability study as to number of people who will be working over the age of 65 in 2012.
Formulate and solve a linear programming model for Julia that will help you advise her on which offer to accept from the director if any. Julia's younger brother who is a freshman at Tech wants to help Julia increase her profits by loaning her so..
Medical studies have shown that 10 out of 100 adults have heart disease. When a person with heart disease is given an EKG test, a 0.9 probability exists that the test will indicate the presence of heart disease.
The U.S. Bureau of Prisons publishes data in Statistics Report on the times served by prisoners released from federal institutions for the first time.
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