Stat

We want to test whether the mean height of eighth graders is 66 inches. State the null and alternative Hypothesis then identify what is the Directional test.

• 25

• 27

• 36

• 40

What is the parameter that measures the variability of every individual in the population?

• Sample Mean

• Population Standard Deviation

• Population Mean

• Sample Standard Deviation

What is the average of the distances from each data point in the population to the mean, squared?

• Sample Mean

• Population Variance

• Population Mean

• Sample Standard Deviation

Choose the statistical question:

• What time did you wake up this morning?

• What time do 12th graders wake up each morning during the school week?

What is the mean of sample values collected?

• Sample Mean

• Population Standard Deviation

• Population Mean

• Sample Standard Deviation

P(Freshman or Pizza):

• 27/50

• 4/50

• 3/50

• 30/50

P(Pizza ∩ Water) =

• 62/182

• 120/400

• 58/400

• 140/400

P(Sandals|Pants):

• 4/20

• 6/15

• 1/2

• 2/7

A group of 125 pick up truck owners were asked what brand truck they owned and whether it had four-wheel drive. The results are given in the two-way table.
You randomly select one truck owner. Which one of the following is true about the events "Owner has a Chevy" and "Owner's truck has four-wheel drive"?

• These two events are mutually exclusive and independent. 

• These two events are mutually exclusive, but not independent. 

• These two events are not mutually exclusive, but they are independent.

• These two events are neither mutually exclusive nor independent.