Statistics & Data Review #2

What is sampling distribution?

• the distributions of different samples from different samples

• the distribution of values taken by the statistic in all possible samples of the same size from the same population.

• the probability distribution of statistics from a small number of samples

What does the standard deviation tell us about the data set?

• How spread out the numbers are

• How much each number in the data set increases by

• How much each number in the data set decreases by

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

The IQR for Brand A equals:

Answer explanation

You must include units with statistics. "17" in an incomplete answer.

Tags

CCSS.6.SP.B.5C

Which of the following isn't a measure of spread?

• mean

• range

• standard deviation

• interquartile range

Tags

CCSS.6.SP.A.3

If a data distribution has one peak in the center and is symmetrical (looks like a bell) we call this a

• uniform distribution

• parabolic distribution

• skewed distribution

• normal distribution

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%
• 95%
• 99.7%
• 50%

Tags

CCSS.HSS.ID.A.4

What is the standard deviation for the data given:

{12, 13, 29, 18, 61, 35, 21}

• 293.67

• 15.87

• 17.14

• 41.98

Which colored curve has the lowest standard deviation?

• Orange
• Red
• Blue
• Green

Tags

CCSS.HSS.ID.A.3

What does a z-score of 0 mean?

• The observation is equal to the mean.

• The observation is 0 points.

• There is no data.

• You can't tell unless you know the data is normal.