The dataset you will use for this quiz contains data from a sample of approximately 1300 adolescents who had been arrested for a felony-level crime. For this quiz, you will be focusing on the measure of impulse control (Impulse_Control). The scale used to measure impulse control ranges from 1-5, with greater scores corresponding to the adolescent having better impulse control.

We are interested in comparing this sample of adolescents' impulse control to the amount of impulse control as measured in the full population of all adolescents in the nation. The mean of impulse control in the national population of adolescents equals 3.82.

Flag question: Question 1Question 11 pts

In the information provided above, what piece of information is missing that would be needed in order to conduct a one-sample z-test (but which is not needed to conduct a one-sample t-test)?

Group of answer choices

The population mean.

The sample mean.

The population standard deviation.

The sample standard deviation.

Flag question: Question 2Question 21 pts

What is the mean level of impulse control for the adolescents in our dataset?

Group of answer choices

M = 2.11

M = 3.07

M = 4.20

M = .94

Flag question: Question 3Question 33 pts

Conduct a one-sample t-test comparing impulse control for the adolescents in our sample to the impulse control for the national population of adolescents. Report your results below by filling in the correct value for each piece of information that would be required to report your results in the following format:

t( ) = , p

Flag question: Question 4Question 41 pts

Report the Cohen's D effect size:

Group of answer choices

.941

.432

-.797

-.733

Flag question: Question 5Question 51 pts

Based on these findings, what decision do we make, and what do we conclude?

Group of answer choices

We decide to reject the null hypothesis, and conclude that our sample of adolescents doesnot differ from the national population of adolescents with respect to impulse control.

We decide to reject the null hypothesis, and conclude that our sample of adolescents does differ from the national population of adolescents with respect to impulse control..

We decide to retain the null hypothesis, and conclude that our sample of adolescents does not differ from the national population of adolescents with respect to impulse control.

We decide to retain the null hypothesis, and conclude that our sample of adolescents does differ from the national population of adolescents with respect to impulse control.