Test 1 Review

A line graph:

• is a normal curve

• shows the relationship between 2 variables

• is a graph of a frequency distribution

• is a skewed distribution

A study examines 3 types of training to see which improves performance best. What is the independent variable?

• Training

• Performance

• The Researcher

• The Participants

What type of graph is used to graph a frequency distribution of a continuous variable?

• histogram

• bar graph

• frequency polygon

• both histogram and frequency polygon

What measure of central tendency would you use if you were examining the type of transportation people took to work? (train, car, walk, bike)

• mode

• median

• mean

• weighted mean

Which type of statistic allows researchers to make decisions about a population?

• Descriptive

• Inferential

What type of variable has upper and lower limits?

• Quantitative

• Qualitative

• Categorical

• Dependent

True or False: A z-score tells us the relative position of an individual/score

• True

• False

The two measures of variability on a box plot are:

• mean and median

• standard deviation and variance

• positive and negative skew

• range and interquartile range