QUESTION 1

1. 1. A researcher wants to know whether there is a difference in the mental health of people who work days, afternoons, or midnight shifts. She administers a depression test to a number of workers from each shift. Higher scores mean higher levels of depression. Results are below.

Use the hypothesis testing procedure to answer this research question at the .05 level of significance.

	days	afternoons	midnights
	24	30	35
	16	32	55
	23	12	32
	8	37	19
	12	14	34
	37	18	27
	19	25	39
	23		41
	42
	21
	SS1	SS2	SS3
SS	970.5	550	781.5

PLEASE USE THIS SCENARIO TO ANSWER QUESTIONS 2- 15

0 points (Extra Credit)

QUESTION 2

1. What is the Research Hypothesis?

1 points

QUESTION 3

1. State the appropriate null hypothesis.

1 points

QUESTION 4

1. What is the value of the Grand Mean? _______

1 points

QUESTION 5

1. What is the value of the SS_B? _____

1 points

QUESTION 6

1. What is the value of the SS_W? _______

1 points

QUESTION 7

1. What is the value of the df_B? _______

1 points

QUESTION 8

1. What if the value of the df_w? ________

1 points

QUESTION 9

1. What is the value of the MS_B? ________

1 points

QUESTION 10

1. What is the vlaue of the MS_w?

1 points

QUESTION 11

1. What is the F- ratio ? __________

1 points

QUESTION 12

1. The is the value of the t-critical?

1 points

QUESTION 13

1. What is my decision about the null hypothesis?

		I fail to reject the null
		I reject the null

1 points

QUESTION 14

1. Now, if you test the hypothesis at the 0.01 level of significance, what would be the t-critical value? ________

1 points

QUESTION 15

1. Now, at a 0.01 level of significance, what would be your decision about the null hypothesis?

		I fail to reject the null
		I reject the null

1 points

QUESTION 16

1. A Nursing student wants to know whether there is a difference in the salaries between the following different types of nurses: OB, ER, Anesthesiology (AN), Pediatrics (PD), and Elder care (EC). She finds a sample of each type of nurse and asks them what their salary is. Please use 0.05 level of significance.

Given Information

	Salaries ($1000's)
	OB	ER	AN	PD	EC
	45	64	81	66	44
	52	56	75	42	38
	51	38	76	59	35
	65	59	90	71	50
	39	61	67	55	61
	45	44	73	31	55
	69	32	84		60
	51	41	66
	69	55
		57
	OB	ER	AN	PD	EC
mean	54	50.7	76.5	54	49		56.8	grand mean
n	9	10	8	6	7
SS	980	1088.1	474	1132	644

PLEASE USE THIS SCENARIO TO ANSWER QUESTIONS 17 - 24 0 points (Extra Credit)

QUESTION 17

1. What is the Research Hypothesis?

1 points

QUESTION 18

1. State the appropriate null hypothesis.

1 points

QUESTION 19

1. What is the value of the SS_B? _____

1 points

QUESTION 20

1. What is the value of the SS_W? _______

1 points

QUESTION 21

1. What is the value of the df_B? _______

1 points

QUESTION 22

1. What if the value of the df_w? ________

1 points

QUESTION 23

1. The is the value of the t-critical?

1 points

QUESTION 24

1. What is my decision about the null hypothesis?

		I fail to reject the null