A sample of n = 10 scores has a mean of M = 9. One person with a score of X = 0 is removed from the sample. What is the value for the new sample mean?
Answer to relevant QuestionsA population of N = 15 scores has a mean of m = 8. One score in the population is changed from X = 20 to X = 5. What is the value for the new population mean? A sample of n = 9 scores has a mean of M = 20. One of the scores is changed and the new mean is found to be M = 22. If the changed score was originally X = 7, what is its new value? Earlier in this chapter (p. 67), we mentioned a research study demonstrating that alcohol consumption increases attractiveness ratings for members of the opposite sex (Jones, Jones, Thomas, & Piper, 2003). In the actual ...For the following sample of n = 8 scores: a. Simplify the arithmetic by first multiplying each score by 2 to obtain a new sample of 0, 2, 1, 0, 6, 1, 0, and 2. Then, compute the mean and standard deviation for the new ...Explain why the formulas for sample variance and population variance are different.
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