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Q1) A year ago, Air Force implemented new test for finding which candidates are most probable to become successful pilots. Now they wish to see if implementing pilot predictor test was a good idea. Scores have been standardized to facilitate comparison.
Pilot
Predictor Score (Y)
Performance Score (X)
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a) Determine the null hypothesis?
b) Compute the value of test statistic?
c) Are results statistically significant? Explain why or why not?
d) What conclusions can you draw from your findings?
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
Which statement is true for a statistical study?
A game involving a pair of dice pays you 3 with probability 17/36, costs you 2 with probability 14/36, and costs you 4 with probability 5/36. What is your probability of losing money in one play of the game?
What is the probability of finding 1 or more children with chronic bronchitis in a population where the incidence rate of chronic bronchitis is 10% (like the one above?)
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A sample of 50 provided a sample mean of 14.15. The population standard deviation is 3.
When using past data, I have found that the proportion of items rejected by quality control personnel is about 3%. We normally make 5000 items per day. For a p chart, what are the upper and lower control limits?
Compute the range and interquartile range
Suppose the probability of the worst-case scenario increases Compute the expected value of perfect information
To determine if this is evidence that students perform worse under uncomfortable conditions, The P-value of a test
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What sample size must you take to be 96% confident that the results will be within $.75 of the true mean cost per call?
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