Question

__________I. According to the Empirical rule, 68.26% of the data (within one standard deviation of the mean) would fall between what two values for a population with mean of 816 and standard deviation of 248?

1. 568 and 1,064             B) 320 and 1,312               C) 748 and 884                  D) 72 and 1,560

___________II. The mean age of all students at a university is 24 years. The mean age of a random sample of 100 students selected from this university if 23.6 years. The statistical conclusion can be __________?

1. the population mean age was incorrect
2. the number in the sample was too large
3. the number in the sample must be increased
4. none of the above

____________III. The population mean and standard deviation cannot be determined for ___?__ data.

A) Qualitative                    B) discrete quantitative                C) binomial               D) continuous quantitative

Answer 1

I. 6826% lies in the interval 816 248

= 568 and 1064

II. C. The number in the sample must be increased

III. A. Qualitative

Qualitative data is not numerical. Mean and standard deviation cannot be determined for such data.