In a distribution of Z scores, the mean is always

Which of the following statements regarding Z scores is FALSE?

If the mean of a test is 13 and its standard deviation is 3, the Z score for a person with a raw score of 7 is

Using the percentage approximations for the normal curve, the percentage of scores between the mean and one standard deviation below the mean is

The symbol used to indicate a population parameter is usually

The symbol for the standard deviation of a sample is

The term relative frequency refers to

If a student who wants to study alcohol use at a high school obtains a complete list of the students and has a blindfolded person select as many people as needed for the study, the student is conducting

If the mean score on a creativity test is 20, the standard deviation is 5, and the distribution is normal, the percentage of people who would obtain scores between 15 and 25 is

If the mean score on a stress scale is 5, the standard deviation is 2, and the distribution is normal, what would be the mean value when converted to a Z distribution?

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