Statistics Semester Review

Which measure of central tendency best represents this data?

• Mean

• Median

• Mode

• Range

What percent of people within 1 standard deviation of the mean?

• 99.7

• 34

• 68

• 95

Which measure of central tendency would best represent this data?

• Mean

• Median

• Mode

• Range

What is normal distribution?

• A symmetrical bell-shaped graph

• A graph that is skewed to the right

• A graph that is skewed to the left

What is the branch of mathematics dealing with the collection, analysis, interpretation, presentation, and organization of data?

• Statistics

• Algebra

• Geometry

• Calculus

A collection and study of data

• Survey

• Sample Size

• Statisitics

The number of students in each year level is counted. What type of data is number of students?

• Numerical

• Categorical

After performing analyses on a set of data, Mrs. Schoeneck examined the scatter plot of the residual values for each analysis. Which scatter plot indicated the best linear fit for the data?

• A

• B

• C

Estimate the correlation coefficient.

• r = -0.8

• r = -0.5

• r = 0.5

• r = 0.8

At a local high school, GPA's are normally distributed with a mean of 2.9 and standard deviation of 0.6. What percentage of students at the high school have a GPA between 2.3 and 3.5?

• 68%

• 99.7%

• 95%

• 84%