Question: Question 1. A) Define the Null Hypothesis B) Define the Alternative Hypothesis Question 2. A researcher studied a sample of adolescents and measured the number

Question 1.

A)Define the Null Hypothesis

B)Define the Alternative Hypothesis

Question 2.

A researcher studied a sample of adolescents and measured the number of delinquent behaviors they did in the past year. The researchers then compared girls vs. boys and found that, on average, boys did .76 more delinquent behaviors in the past year. The standard deviation of the difference was .32.

A) Conduct a z-test for the null hypothesis. Be sure to show your hand-calculations

B) What is the two-tailed p-value for the z-test? Would this be considered statistically significant?

C)What do these findings mean for delinquent behaviors in boys vs. girls?

Question 3.

What is the main way that you can increase statistical power? Explain why this increases power.

Question 4.

Let's say that we know that there is an AAM difference between father present and father absent girls in the population. However, a study designed to test this hypothesis did not find a significant difference. What type of error is this?

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