Question

imagine that you have information about how 20 nursing students and 20 psychology students felt about starting PSYC 3002 on Day 1 of this class. You want to know if nursing students and psychology students felt differently about embarking on the Introduction to Basic Statistics journey.

Explain whether you should retain or reject the null hypothesis and why.

data set

5 Nervous Nursing Students

10 Nervous Psychology Students

15 Excited Nursing Students

10 Excited Psychology Students

Answer 1

H0: Null Hypothesis: Nursing students and psychology students felt differently about embarking on the Introduction to Basic Statistics journey. (Claim)

HA: Alternative Hypothesis: Nursing students and psychology students did not feel differently about embarking on the Introduction to Basic Statistics journey.

Observed Frequencies:

	Nervous	Excited	Total
Nursing Students	5	15	20
Psychology Students	10	10	20
Total	15	25	40

Expected Frequencies:

	Nervous	Excited	Total
Nursing Students	15X20/40=7.5	25X20/40=12.5	20
Psychology Students	15X20/40=7.5	25X20/40=12.5	20
Total	15	25	40

Test Statistic () is got as follows:

Observed (O)	Expected (E)	(O - E)2/E
5	7.5	0.83
15	12.5	0.50
10	7.5	0.83
10	12.5	0.50
Total = =		2.67

ndf = (r - 1) X (c - 1)

= (2 - 1) X (2 - 1)

= 1

By Technology, p - value = 0.1025

Since p - value = 0.1025 is greater than = 0.05, the difference is not significant. Fail to reject null hypothesis.

Conclusion:

The data support the claim that nursing students and psychology students felt differently about embarking on the Introduction to Basic Statistics journey