Review 3.4 (Univariate Data Displays)

Which statement is true about the center of distribution?

• The center is best described using the mean, because the distribution is skewed.

• The center is best described using the median, because the distribution is skewed.

• The center is best described by the mean and median, because the distribution is symmetric.

• The center is best described by the outlier, because the distribution is symmetric.

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

Compare the centers and spreads. 

•  Math has a higher median (center) and a wider spread.
•  Math has a higher median (center) and a smaller spread.
• Math has a lower median (center) and a smaller spread.
• Math has a lower median (center) and a wider spread.

Tags

CCSS.6.SP.A.2

Which type of squirrels are longer on average?

• Red

• Grey

• They're the same

Tags

CCSS.7.SP.B.4

Which group has a greater median reaction time?

• Group A

• Group B

• They're the same

Tags

CCSS.HSS.ID.A.3

Which measure of center is easily influenced by outliers?

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

Which of the following can be used to describe the spread of a distribution? Select all that apply.

• range

• interquartile range

• standard deviation

• mean

• median

Tags

CCSS.6.SP.A.3

On Test 1 you scored 90 (mean=88, SD = 4)

On Test 2 you scored 88 (mean=79, SD=3)

Compute the CV for each Test and find which test was more variable.

• Test 1 = 4.5% and Test 2 = 3.8%, Test 1 is more variable

• Test 1 = 4.5% and Test 2 = 3.8%, Test 2 is more variable

• Test 1 = 4.5% and Test 2 = 3.8%, Neither are more variable

• Test 1 = 2200 and Test 2 = 2633.33, Test 1 is more variable

• Test 1 = 2200 and Test 2 = 2633.33, Test 2 is more variable

Tags

CCSS.HSS.ID.A.4

Compute the coefficient of variation for the sample data:

4, 6, 3, 7, 9, 4, 2, 1, 4, 2

• 59.25%

• 62.25%

• 69.25%

• 72.25%

Tags

CCSS.7.SP.B.4

If the standard deviation of a data set is 4, what is the variance?

• 2
• 16
• 4

If the variance of a data set is 64, what is its standard deviation?

• 8
• 4096
• 4
• 32