SCENARIO 3

Cool College requires that students have at least a 620 SAT math score. A local high school wants their students to do well so that they can get into Cool College. They randomly sample 20 high school students to test if a new SAT test prep results in them meeting Cool College's requirement or better. The sample mean for the 20 high school students is730 with astandard errorof 22.37. Test the null hypothesis with a one samplet-test, using the .05 level of significance.

Select the correct research question for SCENARIO 3

		Did the local high school students who scored a mean of 22.37 score high enough to get into Cool College?
		There is no way to tell
		Did the local high school students who scored a mean of 730 score low enough to get into Cool College?
		Did the local high school students who scored a mean of 730 score high enough to get into Cool College?

QUESTION 10

Select the correct statistical hypothesis for SCENARIO 3

		H0: <620 H1: > 620
		H0:<22.37 H1: > 22.37
		H0:<730 H1: > 730
		H0:>620 H1: < 620

QUESTION 11

Type what the correct degrees of freedom is for SCENARIO 3. Must show how you solved the equation to receive credit. Use - for subtracting and = for equal sign.

QUESTION 12

1.

Select the correct criticaltvalue for SCENARIO 3

		.05
		1.729
		-1.729
		+ or -1.729

QUESTION 13

1.

Select the correct decision rule regarding the null hypothesis for SCENARIO 3

		Reject the null hypothesis if the t observed value is greater than +or -1.729
		Reject the null hypothesis if the t observed value is less than 1.729
		Reject the null hypothesis if the t observed value is greater than.05
		Reject the null hypothesis if the t observed value is greater than 1.729

QUESTION 14

Type what the observed t score is for SCENARIO 3. Must show how you solved the equation to receive credit. use - for minus sign, / for division sign, and = for equal sign.

QUESTION 15

1.

Select the correct decision and explanation about whether or not you should reject H₀for SCENARIO 3

		Reject the null hypothesis because the t observed value of 5.92 is greater than the t critical value of 1.729.
		Reject the null hypothesis because the t observed value of 5.92 is less than the t critical value of 1.729.
		Reject the null hypothesis because the t observed value of 4.92 is less than the t critical value of 1.729.
		Reject the null hypothesis because the t observed value of 4.92 is greater than the t critical value of 1.729.

QUESTION 16

1.

Select the best interpretation of the results for SCENARIO 3

		The local high school students who scored a mean of 730 did not score high enough to get into Cool College
		The local high school students who scored a mean of 730 did score high enough to get into Cool College.
		The local high school students who scored a mean of 630 did not score high enough to get into Cool College
		The local high school students who scored a mean of 630 did score high enough to get into Cool College

QUESTION 17

SCENARIO 4

A psychologist investigates the effect of modeling aggression on the amount of aggressive behaviors a child exhibits. She hypothesizes that children who view aggressive behaviors will exhibit more aggressive behaviors compared to those who view kind behaviors. Subjects are randomly assigned, in equal numbers, to two different conditions. Ten children watch an adult behave aggressively with some toys (X₁), and 10 other children watch an adult behave kindly with some toys (X₂). Each of the 20 participants are then placed in a room with the toys while the psychologist counts how many aggressive behaviors are exhibited by each child. Children who watched the adult behave aggressively exhibited on average 17 aggressive behaviors with a Sum of Squares of 672. Those who watched the adult behave kindly exhibited on average 8 aggressive behaviors with a Sum of Squares of 226. Use an independent samplest-test to test the null hypothesis at the .05 level of significance.

Select the correct research question for SCENARIO 4

		Those who watch an adult behave aggressively with toyswill exhibit fewer aggressive behaviors thanthosewho watch an adult behave kindly with toys.
		There is no way to tell
		Those who watch an adult behave aggressively with toyswill exhibit more aggressive behaviors than thosewho watch an adult behave kindly with toys.
		Those who watch an adult behave aggressively with toyswill exhibit the same amount ofaggressive behaviors when compared tothosewho watch an adult behave kindly with toys.

QUESTION 18

Select the correct statistical hypothesis for SCENARIO 4

		H0:1-2>0 H1:1-2<0
		H0: 1- 2<0 H1: 1- 2> 0
		H0:1-2=0 H1:1-20
		H0:1-2<672 H1:1-2> 672

QUESTION 19

Type what the correct degrees of freedom is for SCENARIO 4. Must show how you solved the equation to receive credit. Use + for adding, - for subtracting, and = for equal sign.

QUESTION 20

Select the correct criticaltvalue for SCENARIO 4

		+ or -1.734
		1.734
		.05
		-1.734

QUESTION 21

Select the correct decision rule for SCENARIO 4

		Reject the null hypothesis if t observed is greater than 1.734or less than -1.734
		Reject the null hypothesis if t observed is less than 1.734
		Reject the null hypothesis if t observed is greater than 1.734
		Reject the null hypothesis if t observed is greater than .05