Statistics Review

What is the MODE of this data?

• 100
• 20
• 80, 85, and 90
• none

Name the correlation in this graph

• Positive correlation

• Negative correlation

• No correlation

• Lots of correlation

The mean is...

• the middle

• the average number (added together, then divided by the number of dots)

• The most frequent number

• The middle when in order

What is the shape of the dot plot shown?

• skewed left

• skewed right

• symmetrical

Which plot has a larger interquartile range?

• Top plot
• Bottom plot

Isaiah collects data from two different companies, each with four employees. The results of the study, based on each worker’s age and salary, are listed in the tables below.

Which statement is true about these data?

• The mean age of workers at company 1 is greater than the mean age of workers at company 2.

• The median salaries in both companies are greater than $37,000.

• The mean salary in company 1 is greater than the mean salary in company 2.

• The salary range in company 2 is greater than the salary range in company 1.

A collection of methods for planning experiments, obtaining data, and then

then organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on the data.

• Results

• Statistics

• Algebra

• Essay

Observations (such as measurements, genders, survey responses) that have been collected.

• Data

• Number

• Figure

• Letter

Area of statistics about making decisions and drawing conclusions about populations.

 

• Descriptive Statistics

• Inferential Statistics

What is the type of variable?

The length of time to complete a mathematics homework assignment

• Qualitative

• Quantitative