Homework #2 (20 points)
1. The following correlation matrix represents relationships among variables within the nursing work environment in a hypothetical study. These fictitious data were obtained from registered nurses working in different hospitals and on different units. For each variable a higher score indicates more of the attribute
Variables 
1 
2 
3 
4 
5 
6 
7 

1.0 







.44 
1.0 






.59 
.67 
1.0 





.61 
.62 
.53 
1.0 




.35 
.59 
.44 
.61 
1.0 



.18 
.10 
.26 
.18 
.32 
1.0 


.45 
.36 
.25 
.48 
.53 
.35 
1.0 
n=890
False or True (circle one)
2. (1 point each) For each of the following indicate if a correct decision was made, a Type 1 or Type II error.
____ Accepting the null hypothesis when the research hypothesis is true.
____ Rejecting the null hypothesis when the research hypothesis is false.
____ Rejecting the null hypothesis when the research hypothesis is true.
3. A random sample of 200 nurses from a university hospital was administered a scale to measure job satisfaction. The possible scores ranged from 0 to 80. Scores for the sample were approximately normal in distribution with a mean of 55 and standard deviation of 5.
Please calculate the following:
(2 points) Between what two scores are approximately 95% of the nurses expected to fall ?
(2 points) What is the standard error of the mean estimated from this sample?
4. (1 point) If a researcher calculates a test statistic to be 2.2, and the critical value is 2.0, the researcher would make which of the following decisions?
5. A ttest was used to determine if there was a significant difference in mean scores of male and female nursing student perceptions of the image of nursing. Perceptions of the image of nursing were measured using 20 items on a 5 point Likerttype scale.

Perception of the Image of Nursing scores – tTest results 


N 
Mean 
Std Dev 
T 
df 
p 
Males 
154 
34.02 
4.91 
1.62 
434 
0.105 
Females 
225 
33.17 
5.71 



Levene’s Test = .058
Using the above table please answer the following questions.
a. (1 point) Is this test an independent or dependent ttest? Explain.
b. (2 points) Is the assumption for the Levene’s test met? Why or why not? Provide statistical
evidence
c. (1 point) How many total subjects are in the sample?
d. (1 point) What is the possible range of scores for perception of the image of nursing?
e. (1 point) What conclusion can be made based on the results?
1. There is a significant difference in mean perception of the image of nursing scores between male and female nursing students.
2. There is not a significant difference in mean perception of the image of nursing scores between male and female nursing students.
3. Male nursing students reported a statistically significant higher perception of the image of nursing scores score as compared to female nursing students.
4. Female nursing students reported a statistically significant lower perception of the image of nursing scores score as compared to male nursing students.
Subject  General 
Due By (Pacific Time)  11/14/2014 10:00 am 
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