1. A group of people had their body fatness measured. The mean and standard deviation was 38% ± 4%. The 4% means:
The group's percent fat did not fall below 4%
The body fat percent measurement is 4% accurate
68% of the fatness values fall between 34% and 42%
68% of the fatness values fall between 36% and 40%
2. How likely would it be for a person from group 1 (38% ± 4%) to have a body fatness of 50%?
Very likely
Unlikely but possible
Impossible
Unable to be determined based on the information given
3. Measures of central tendency include all of the following EXCEPT:
Median
Mean
Range
Mode
4. Consider two separate groups of people who had their body fatness measured. The mean and standard deviation for group 1 was 38% ± 4% and for group 2 was 38% ± 7%. The variability is:
The same in both groups
Too low
Greater in group 2
Greater in group 1
5. A group of people had their body fatness measured. The mean and standard deviation was 38% ± 4%. If there was a measurement error and the heaviest person went from 40% fat to 50% fat, what would happen to the mean?
It would increase.
It would decrease.
It would stay the same.
Unable to be determined based on the information given
6. Because of its dependence on two extreme scores, the ______ is not usually a meaningful measure of variability.
Median
Mode
Range
Standard deviation
7. A group of people had their body fatness measured. The mean and standard deviation was 38% ± 4%. If there was a measurement error and the heaviest person went from 40% fat to 50% fat, what would happen to the median?
It would increase
It would decrease
It would stay the same
Unable to be determined based on the information given
8. A group of people had their body fatness measured. The mean and standard deviation was 38% ± 4%. If this distribution was exactly normal, the mode would be:
38%
34%
42%
Unable to be determined based on the information given
9. Consider two separate groups of people who had their body fatness measured. The mean and standard deviation for group 1 was 38% ± 4% and for group 2 was 38% ± 7%. If group 1's scores are normally distributed, group 2's distribution would be more:
Platykurtic
Negatively skewed
Positively skewed
Leptokurtic
10. A group of people had their body fatness measured. The mean and standard deviation was 38% ± 4%. If this distribution was exactly normal, the median would be:
38%
34%
42%
Unable to be determined based on the information given