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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 Flag this Question 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 Flag this Question Q3 Which measure(s) of central tendency CANNOT be applied to nominal data? Group of answer choices Mean & Median Mean Mode Median Flag this Question 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 Flag this Question Q5 A distribution with an equal mean, median and mode is said to be: Group of answer choices symmetrical bimodal negatively skewed positively skewed Flag this Question Q6 Standard deviation is a measure of: Group of answer choices variability central tendency nominal variables none of the above Flag this Question Q7 Fifty percent of the scores fall below the mean in a normal curve. Group of answer choices True False Flag this Question Q8 The higher the standard deviation, the greater the variation in the sample. Group of answer choices True False Flag this Question 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 Flag this Question 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 Flag this Question 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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