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A school superintendent wants to know how his district's students did on a nationwide standardized achievement test. The test was administered to all on-site students. Unfortunately, 23 students in an EMR (educationally mentally retarded) program as well as 32 in a gifted program (very high IQ) attend classes off-site and so were not able to be tested. What measure of central tendency best summarizes the performance of all the district's students?
To test the effectiveness of a new type of plastic handcuffs, a law enforcement agency puts the cuffs on a sample of 30 persons who belong to the local weightlifting club. None is capable to break free from the cuffs. What type of sampling techniq..
How many times per month do you go to the movies?- Do you consider yourself to be well-informed about recent movies or not?
Backfat thickness is a variable used in evaluating the meat quality of pigs. An animal scientist measured backfat thickness (cm) in pigs raised on two different diets, with the results given in the table.
The next table shows the results of this independent t-test. At the .05 significance level, can we conclude that there is a difference in their mean times? Explain these results to a person who knows about the t test for a single sample but is unf..
Find the given probabilities for X = pulse rates of women, for which the mean is 75 and the standard deviation is 8. Assume a normal distribution.
What is the finite population correction factor? Why is it used? When should it be used?
What is the probability that a simple random sample of 100 male graduates will provide a sample mean more than $4,000 below the population mean
a sample of 132 motels is selected from a large urban area and the price for a night of lodging for a single room was
For each sex, determine the median response.- Do you think there's a "significant" difference between the weekly amount that men and women exercise? Explain.
following are some descriptions of sampling procedures. classify the type of sampling as probability or
Conduct a PsycINFO search to find information on the construct validity of a psychological measure.- Read about a measure that interests you and describe the reliability and validity research reported.
1. Name four types of materials used for seals. 2. What is the purpose of a durorneter?
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