Question

1. Researchers obtained a sample of 36 college students who all have the same history instructor this semester. Half of the students were shown a 2-min video that claimed the purpose of education was to help students “learn how to learn” so that they can enjoy a lifetime of learning after college. The other half of students were shown a 2-min video that claimed the purpose of education was to teach facts to students. After watching the 2-min videos, the students were asked to rate their history instructor using a 10-point scale, 1 = very bad teacher to 10 = very good teacher. The mean and standard deviations for each group of 18 students are provided below. Use the provided information to answer the next four questions. Use an α of .05, two tailed.

   “learn to learn” Group 1: M₁ = 5.9, SD₁ = 1.8, n₁ = 18

   “learn facts” Group 2: M₂ = 7.2, SD₂ = 1.7, n₂ = 18

   Which fact suggests that the normality assumption was met?

   	a.	Students’ rating were not influenced by other students’ ratings.
   	b.	The ratings of teachers are normally distributed.
   	c.	The study clearly defined how the two groups were different and the ratings were measured on an interval/ratio scale.
   	d.	The two sample SDs are similar.

2. Researchers obtained a sample of 36 college students who all have the same history instructor this semester. Half of the students were shown a 2-min video that claimed the purpose of education was to help students “learn how to learn” so that they can enjoy a lifetime of learning after college. The other half of students were shown a 2-min video that claimed the purpose of education was to teach facts to students. After watching the 2-min videos, the students were asked to rate their history instructor using a 10-point scale, 1 = very bad teacher to 10 = very good teacher. The mean and standard deviations for each group of 18 students are provided below. Use the provided information to answer the next four questions. Use an α of .05, two tailed.

“learn to learn” Group 1: M₁ = 5.9, SD₁ = 1.8, n₁ = 18

“learn facts” Group 2: M₂ = 7.2, SD₂ = 1.7, n₂ = 18

Which fact suggests that the approprate measurement assumption was met?

	a.	Students’ rating were not influenced by other students’ ratings.
	b.	The ratings of teachers are normally distributed.
	c.	The study clearly defined how the two groups were different and the ratings were measured on an interval/ratio scale.
	d.	The two sample SDs are similar.

3. Researchers obtained a sample of 36 college students who all have the same history instructor this semester. Half of the students were shown a 2-min video that claimed the purpose of education was to help students “learn how to learn” so that they can enjoy a lifetime of learning after college. The other half of students were shown a 2-min video that claimed the purpose of education was to teach facts to students. After watching the 2-min videos, the students were asked to rate their history instructor using a 10-point scale, 1 = very bad teacher to 10 = very good teacher. The mean and standard deviations for each group of 18 students are provided below. Use the provided information to answer the next four questions. Use an α of .05, two tailed.

“learn to learn” Group 1: M₁ = 5.9, SD₁ = 1.8, n₁ = 18

“learn facts” Group 2: M₂ = 7.2, SD₂ = 1.7, n₂ = 18

Which fact suggests that the data independence assumption was met?

	a.	Students’ rating were not influenced by other students’ ratings.
	b.	The ratings of teachers are normally distributed.
	c.	The study clearly defined how the two groups were different and the ratings were measured on an interval/ratio scale.
	d.	The two sample SDs are similar.

4. Researchers obtained a sample of 36 college students who all have the same history instructor this semester. Half of the students were shown a 2-min video that claimed the purpose of education was to help students “learn how to learn” so that they can enjoy a lifetime of learning after college. The other half of students were shown a 2-min video that claimed the purpose of education was to teach facts to students. After watching the 2-min videos, the students were asked to rate their history instructor using a 10-point scale, 1 = very bad teacher to 10 = very good teacher. The mean and standard deviations for each group of 18 students are provided below. Use the provided information to answer the next four questions. Use an α of .05, two tailed.

“learn to learn” Group 1: M₁ = 5.9, SD₁ = 1.8, n₁ = 18

“learn facts” Group 2: M₂ = 7.2, SD₂ = 1.7, n₂ = 18

Select the two-tailed null and research hypotheses for this statistical analysis.

	a.	H0: µ1 ≠ µ2; H1: µ1 = µ2
	b.	H0: µ1 = µ2; H1: µ1 ≠ µ2
	c.	H0: µ1 > µ2; H1: µ1 ≤ µ2
	d.	H0: µ1 ≤ µ2; H1: µ1 > µ2

5. Researchers obtained a sample of 36 college students who all have the same history instructor this semester. Half of the students were shown a 2-min video that claimed the purpose of education was to help students “learn how to learn” so that they can enjoy a lifetime of learning after college. The other half of students were shown a 2-min video that claimed the purpose of education was to teach facts to students. After watching the 2-min videos, the students were asked to rate their history instructor using a 10-point scale, 1 = very bad teacher to 10 = very good teacher. The mean and standard deviations for each group of 18 students are provided below. Use the provided information to answer the next four questions. Use an α of .05, two tailed.

“learn to learn” Group 1: M₁ = 5.9, SD₁ = 1.8, n₁ = 18

“learn facts” Group 2: M₂ = 7.2, SD₂ = 1.7, n₂ = 18

Compute the df and find the critical value.

	a.	-2.1009
	b.	-2.8784
	c.	-2.0322
	d.	-2.7284
	e.	-2.1098
	f.	-2.8982

Answer 1