1. According to the empirical rule, in a normally distributed set of data, appro

Question

1. According to the empirical rule, in a normally distributed set of data, approximately what proportion of the scores will be 1 (-1 to +1) standard deviation away from the mean?

2. If you took an IQ test and your score was 2 standard deviations above the mean, approximately what percentage of scores would your score be higher than?

3. Which of the following statements is true of both the sampling distribution of the mean and the standard error of the mean?

4. What do standard deviation and variance tell us about a sample data?

5. Which of the following statement is true about a very short and flat frequency distribution?

Explanation / Answer

1. 68%

2) 98%

3) None of the other answers are correct

4) The degree to which the data are spread out from the mean.

5) Scores are more spread out, and it will likely have a relatively large standard deviation.

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