Ch 4 Review Questions
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1
what is the median for the following data set 8 8 9 10 11 11 11 12
- 10.5
- 10
- 11
- 11.5
2
when a study describes a sample as 62% female, this percentage is an example of what type of statistic?
- mode
- range
- standard deviation
- frequency
3
The mode is the most useful measure of central tendency when the data
- is skewed
- includes a few outliers
- is categorical
- is normally distributed
4
what type of graph is best to use when you want to illustrate changes over time
- bar graph
- histogram
- pie chart
- line graph
5
In a normal distribution, the percentage of people that have scores one standard deviation above and one standard deviation below the mean is
- appoximately 68%
- approximately 34%
- approximately 27%
- approximately 96%
6
In which of the following samples would you expect to find the largest standard deviation for a set of scores measuring cardiovascule endurance?
- a group of long distance runners
- a group of sedentary adults
- a group of pickleball athletes
- a group that includes both sedentary and active adults
7
If an exam were very easy, and most students received very high grades and very few people received low grades, the frequency distribution would be described as
- bimodal
- negatively skewed
- positively skewed
- normally distributed
8
In a hypothetical normal distribution, the mean is 10 and the standard deviation is 3. What is the score for a person who scores -1 standard deviations below the mean
- 13
- 10
- 7
- -3
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