## Transcribed Text

Q1
How many standard deviations tend to (almost) cover the ENTIRE range of scores in a
normal distribution?
Group of answer choices
6
4
2
8
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Q2
The relative likelihood of the occurrence of any given event is known as that event's:
Group of answer choices
Probability
Standard Deviation
Area under the normal curve
All of the Above
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Q3
Which measure(s) of central tendency CANNOT be applied to nominal data?
Group of answer choices
Mean & Median
Mean
Mode
Median
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Q4
Deviation refers to the:
Group of answer choices
the distance of any score from the mean
the number of scores not equal to the mean
the variance between the scores
none of the above
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Q5
A distribution with an equal mean, median and mode is said to be:
Group of answer choices
symmetrical
bimodal
negatively skewed
positively skewed
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Q6
Standard deviation is a measure of:
Group of answer choices
variability
central tendency
nominal variables
none of the above
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Q7
Fifty percent of the scores fall below the mean in a normal curve.
Group of answer choices
True
False
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Q8
The higher the standard deviation, the greater the variation in the sample.
Group of answer choices
True
False
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Q9
A distribution with a mean= 25, median=22.5, and mode=20, is said to be:
Group of answer choices
positively skewed
negatively skewed
symmetrical
bimodal
Q10
A criminal investigator is working to bring two separate and distinct serial killers to
justice. From previous experience, the investigator believes there is a .50 chance of
apprehending the first serial killer, and a .65 chance of apprehending the second serial
killer. To calculate the probability that he will capture BOTH serial killers, you must
ADD the two probabilities.
Group of answer choices
True
False
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Q11
Match the level of measurement to the variable described. Certain level(s) may be the
answer for more than one question, and/or certain level(s) may not be used as an
answer at all. Each correct match earns you .5 point.
Group of answer choices
Political Party Affiliation: Democrat, Independent, Republican, None of the
above/Other
[ Choose ] Ordinal Interval Ratio Nominal
Education: Less than High School, High School Diploma/GED, Some College,
Bachelor's Degree, Master's Degree, Doctoral Degree
[ Choose ] Ordinal Interval Ratio Nominal
Time of Day
[ Choose ] Ordinal Interval Ratio Nominal
Number of Years Married
[ Choose ] Ordinal Interval Ratio Nominal
Religious Affiliation: Agnostic, Buddhist, Christian, Hindu, Jewish, Muslim, None,
Other
[ Choose ] Ordinal Interval Ratio Nominal
Frequency of Drug Use: Daily, A few times a week, Once a week, 2-3 times per month,
Once a month, Not often
[ Choose ] Ordinal Interval Ratio Nominal
# of Life Stressors: How many of the following life stressors have you experienced in
the past 12 months? Death of a family member/loved one, Marriage, Divorce, Birth of a
New Child, New Job, Moved Residence, Treatment of self/spouse/child/parent for
serious illness
[ Choose ] Ordinal Interval Ratio Nominal
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Q12
The Adverse Childhood Experiences scale was used to examine impact of
childhood trauma in Nigeria (Links to an external site.) . The mean ACEs score
was 46.3, overall, with a standard deviation of 23.5.
If a woman in the sample had an ACE score of 50, what percentile does
she represent? (2 points)
And how could you translate this finding into helpful terms for her social
worker? (1 point)
Q13
A game of chance consists of tossing a (two-sided) coin, drawing from deck of 52
cards, and rolling a 6-sided die.
a) What is the probability that you get A HEAD on the coin, AN ACE from the deck
of cards, and AN EVEN NUMBER on the die?
Q14
All 100 families referred to a child welfare program for child abuse or neglect during
2006 in Oak County were randomly assigned to 2 groups. Fifty families were assigned
to receive Intervention D, an innovative and intensive family preservation approach.
The other 50 families received routine child welfare services. Outcome was measured
by having the practitioners assigned to each family complete the Child Welfare
League’s Family Risk scale on each family before and after treatment. This scale
measures the practitioner’s judgment of the quality of parenting and the likelihood of
future abuse or neglect in each family. The higher the score, the more risk of abuse or
neglect. The mean score of the families receiving Intervention D dropped from 50 to 20,
whereas the mean score of the routine treatment families fell only slightly, from 45 to
40. This difference was highly significant, and Intervention D is therefore recommended
as an effective family preservation intervention.
a) State the Null Hypothesis (.5 point)
b) Identify the level of measurement for the IV and DV (.5 point)
c) What statistical test was likely used to calculate the findings reported above?
(1 point)
Q15
The slope of the regression line for predicting Y, from X, is 6. The Y intercept for that
line is 4. What is the formula?
Q16
A survey asked how often people used the internet.
96 responded that they never use it
214 said they rarely use it
572 said they use it occasionally
368 said they use it all the time
a) Design, and complete, a table to represent the frequency distribution for the
answers outlined above. Make sure to include frequency, relative percentage, and
cumulative percentage (.5 point).
b) Design, and complete a graphical representation of the data (.5 point).
Q17
In a study of student satisfaction in the MSW program at Wurzweiler School of Social Work, 58
advanced year students were surveyed through an online instrument administered in their
Research II class. Overall student satisfaction was measured on a 10 point scale, where 1 was
NOT SATISFIED and 10 was HIGHLY SATISFIED. satf19$q0073- Overall Student
SatisfactioStudent satisfaction with field work was measured on a 2 point scale, where 1 was
NOT SATISFIED and 2 was SATISFIED. satf19$q0071- Fieldwork Satisfaction (Yes/No)
The following is R output of a t-test exploring the relationship between Overall Student
Satisfaction and Student Satisfaction in field Work.
> t.test(satf19$q0071,satf19$q0073)
Welch Two Sample t-test data:
satf19$q0071 and satf19$q0073
t = -17.108, df = 52.748, p-value < 2.2e-16
alternative hypothesis: true difference in means is not equal to 095 percent confidence interval: -
6.322688 -4.995573
sample estimates:
mean of 1 1.76087
mean of 2 7.42000
a)What is the null hypothesis? (.5 point)
b)Is the t statistic significant? How do you know? (.5 point)
c)Interpret the findings in narrative form (1 point)
Q18
Using the satf19 dataset (available in Week 7, along with Codebook), analyze the
relationship between the following two variables:
Overall Satisfaction- q0073
and
Program Type- q0001
What Wurzweiler program are you currently enrolled in?
1- Advanced standing
2- Block
3-Fullyear/Concurrent,
4- PEP
5- Asynchronous Online
6- Live Online
a) What level of measurement is Overall Satisfaction (.5 point)?
b) What level of measurement is "Program Type"? (.5 point)
c) What is the null hypothesis? (.5 point)
d) What statistical test should/did you use, and why? (.5 point)
e)Provide your syntax and output(1 point)
f)Is the statistic you chose significant? (.5 point)
g)Interpret the findings in narrative form (.5 point)
Q19
The data from the satisfaction survey described above is available to you on Canvas
(Satf19).
Using this dataset, analyze the relationship between the following two variables:
Overall Satisfaction (measured as described above)- q0073
and
"PilingDifficulties"- q0067
"In the last month, how often have you felt difficulties were piling up so high that you
could not
overcome them?
Very Often, Fairly Often, Sometimes, Almost Never, Never
a) What level of measurement is "Piling Difficulties"? (.5 point)
c) What is the null hypothesis? (.5 point)
d) What statistical test should/did you use, and why? (.5 point)
e)Provide your syntax and output(1 point)
f)Is the statistic you chose significant? (.5 point)
g)Interpret the findings in narrative form (.5 point)
Q20
Using the Satf19 dataset, analyze the relationship between the following two variables:
Are you a Full-Time (2) or Part-Time (1) student? (q0002)
AND
Satisfaction with Field Placement (q00071), measured in 2 categories.
a) What level of measurement is q0002 (.5 point)?
b) What level of measurement is q00071? (.5 point)
c) What is the null hypothesis? (.5 point)
d) What statistical test should/did you use, and why? (.5 point)
e)Provide your syntax and output(1 point)
f)Is the statistic you chose significant? (.5 point)
g)Interpret the findings in narrative form (.5 point)

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