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Military often provides a form of qualification test for people to enter special career fields. Suppose that a large number of people have taken a test for a certain career field. Suppose that the mean of all people taking this test is 250 points, with a standard deviation of 50 points. Assume that the scores of those previously taking the test were normally distributed. For this career field, only those people scoring in the top 20% are eligible for admission to career field training. What is the score that must be achieved to reach at least the top 20%.
the shape of the distribution of the time required to get an oil change at a 15 minute facility is unknown. however
the following summary table presents the results from a repeated-measures anova comparing three treatment conditions.
a textbook publisher puts out 72 new books each year which are classified as elementary intermediate and advanced. the
What was the test statistic? What was the critical value for both the one- and two-tailed test?
1 two dice are thrown n times in succession. compute the probability that double 6 appears at least once. how large n
You just saw an ad on television that states the majority of the population would vote to make smoking illegal.
a) State the null and alternate hypothesis. b) Determine which distribution to use for the test statistic, and state the level of significance.
The file snoqualmie14.txt contains the daily precipitation (in inches) in Snoqualmie Falls, WA, for a random sample of 365 days.
a repeated-measures study comparing two treatments with n 4 participants produces md 2 and ss 75 for the difference
(a) Write the event ''a score equal to 68.8'' in terms of X: (b) Find the probability of this event: (c) Find the probability that a randomly chosen score
a sample of 200 smokers were asked at what age they started smoking. the sample mean was 18.3 years with a standard
What is accumulated sum of the following stream of payments? $24,491 every year at the beginning of the year for 8 years, at 7.12 percent, compound annually
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