Week 4 Quiz | Coursehero Helper

I’m studying for my Psychology class and don’t understand how to answer this. Can you help me study?

Question Completion Status:

QUESTION 1

1. Calculate Cronbach’s coefficient alpha estimate of reliability for these six items. Click ANALYZE>SCALE>RELIABILITYANALYSIS. Move the six items into the “Items” box. Click “Statistics” and under “Descriptives for” select “Scale” and “Scale if item deleted.” Click “Continue.” Select “Alpha” for the model. Click “OK.” The alpha coefficient is:

   	a.	.45
   	b.	.57
   	c.	.79
   	d.	.84

2 points

QUESTION 2

1. Review the results you generated to answer the last question. The scale standard deviation is:

   	a.	5.02
   	b.	4.02
   	c.	25.2
   	d.	17.1

2 points

QUESTION 3

1. A scale’s standard error of measurement can be calculated from its standard deviation and reliability. Based on the coefficient alpha and standard deviation that you just calculated, what is this scale’ s standard error of measurement? (Hint: see Anastasi & Urbina, 1997, p. 107).

   	a.	2.32
   	b.	3.28
   	c.	3.56
   	d.	4.56

2 points

QUESTION 4

1. Jane obtained a score of 20 on the financial risk-taking scale. There is a 99% chance that her true score is between:

   	a.	6.3 – 33.7
   	b.	14.0 – 26.0
   	c.	11.1 – 23.1
   	d.	8.2 – 31.8

2 points

QUESTION 5

1. Which item would you eliminate in order to improve Cronbach’s coefficient alpha for the scale?

   	a.	R1
   	b.	R3
   	c.	R5
   	d.	R6