Statistics Quiz

Given the dot plot to the right, what is the mean?

• 2.5

• 3.0

• 2.0

• 1.5

Given the dot plot to the right, what is the standard deviation?

• 1.87

• 2.00

• 1.50

• 1.25

On the Normal Curve shown below, about what percent of people scored above 180?

• 0.15%

• 2.35%

• 13.5%

• 34%

In what range do the middle 95% of all people lie?

• 60 to 240

• 90 to 150

• 120 to 180

• 70 to 230

A national polling company claims that 0.62 of US adults say mathematics is not the most valuable school subject. The distribution has a standard deviation of about 0.05 with a confidence interval of 95%. What is the margin of error?

• 0.01

• 0.02

• 0.03

• 0.04

How many juniors were included in the random sample for the study?

• 300

• 350

• 400

• 450

Which rule is used to estimate the confidence interval for the mean in the study?

• Central Limit Theorem

• Empirical Rule

• Chebyshev's Theorem

• Law of Large Numbers

The student of some of a population’s members in order to gather data is known as what?

• Bias

• Sample

• Population

• Ethics

What term describes data that you collect?

• Secondary Data

• Primary Data

• Random Sample

• Bias

What is the collection of all data, such as responses, measurement, or counts, that are of interest?

• Sample

• Population

• Ethics

• Bias