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Personnel tests are designed to test a job? applicant's cognitive? and/or physical abilities. A particular dexterity test is administered nationwide by a private testing service. It is known that for all tests administered last? year, the distribution of scores was approximately normal with mean 77 and standard deviation 7.9
a. A particular employer requires job candidates to score at least 83 on the dexterity test. Approximately what percentage of the test scores during the past year exceeded 83??
b. The testing service reported to a particular employer that one of its job? candidate's scores fell at the 95th percentile of the distribution? (i.e., approximately 95?% of the scores were lower than the? candidate's, and only 55?% were? higher). What was the? candidate's score?
true or false if a distribution of scores is transformed into z scores the absolute value of the sum of the positive z
Assuming normal populations with equal standard deviations, use the 0.01 level in examining whether pulling the trailer uses significantly less fuel than driving with the rooftop carrier.
Their monitoring plan will take a random sample of 5 days sales per month and use the sample mean sales to identify shops that are under-performing. Establish the lower limit sales such that only 5% of the shops would have a sample sales mean belo..
If samples of size 224 were repeatedly selected from the population of children born to mothers with HIV antibody, what would be the mean number of infected children per sample?
List one unclear concept regarding regression and provide an example from your personal or work life where regression could be used to show a relationship between two variables.
This question has to do with power. Suppose in a clinical study you have two groups with 10 subjcects in each group. No significance at the .05 level is found but there is a medium effect size, which is judged to be of practical significance. What sh..
Find the probability that one or more of the five parolees will be repeat offenders. (Round your answer to three decimal places.)
according to the national education association the mean salary of public school teachers was 35819 in 1994. assume
a researcher hypothesizes that individuals who listen to classical music will score differently from the general
We will select a random sample of 8 cigarettes and conduct a hypothesis test at the 10 % level of significance to determine whether the true mean nicotine content of all cigarettes differs from 8.4 mg.
Assuming that the manager's claim is correct, calculate the probability that 117 or fewer of 205 randomly selected marketing researchers would disapprove of the scenario.
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