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.

Evaluate responses using AI:

OFF

• 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.