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A psychologist is conducting a study in which 30 students attend workshops by the speaking center for one hour per week over six weeks to reduce anxiety about public speaking. It is known that anxiety about public speaking is normally distributed with a mean of 36 and a standard deviation of 8.
The research hypothesis for this question is that the mean anxiety level of the students who participate in the workshops will be _____ those who do not.
If a class of 30 students is chosen at random from the university population, find the mean and variance of the number of male students.
Derive rules to test whether a number is divisible by N, where N ranges from 2 to 13. E.g. A number is divisible by 3 if the sum of the digits is divisible by 3.
Find out the expected shape of distribution of sample mean?
Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.
suppose the counselor found the sum of squared deviations from the mean of the sample to be 135. given that he tested
SAT I scores around the nation tend to have a mean scale score around 500, a standard deviation of about 100 points and are approximately normally distributed. A person who scores (a perfect) 800 on the SAT I has approximately what percentile rank..
assume that the mean sat score in mathematics for 11th graders across the nation is 500 and that the standard deviation
The weight of a .5 cubic yard bag of landscape mulch in uniformly distributed over the interval from 38.5 to 41.5 pounds. Give a mathematical expression for the probability density function.
Suppose we sample five boys and five girls, and find that the average height of the boys is 0.5 inches more than the average height of the girls.
The 50 computer mice inspectors at a particular factory can only inspect 34 mice per hour. Does the company have reason to believe that these inspectors are slower than average at α = 0.10?
The response on a scale from 1 to 10 to the question: "Considering all the business you do with Bank of America, what is your overall satisfaction with Bank of America?
Write a Brief Review of the Literature. Be sure to include the five studies from the Week 6 assignment and all relevant sources from your previous course work.
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