RES710 Week 1 | Statistics in Mathematics - Uop university

RES710 Statistical Research Methods And Design I Week 1 Quiz Question 1What is the level of measurement for the variable: number of people in your statistics class?

1. ordinal

2. nominal

3. interval-ratio

4. none of the above

1. Question 2What is the level of measurement for the variable: percentage of students who are first-generation college students at your school?
2. ordinal
3. nominal
4. interval-ratio
5. none of the above

Question 3What is the level of measurement for the variable: name of each academic major offered in your college?

1. ordinal

2. nominal

3. interval-ratio

4. none of the above

Question 4What is the level of measurement for the variable: rating of the overall quality of a textbook, on a scale from excellent to poor?

1. ordinal

2. nominal

3. interval-ratio

4. none of the above

Question 5What is the level of measurement for the variable: type of transportation a person takes to school (e.g., bus, walk, car)?

1. ordinal

2. nominal

3. interval-ratio

4. none of the above

Question 6What is the level of measurement for the variable: number of hours you study for a statistics exam?

1. ordinal

2. nominal

3.interval-ratio

4.none of the above

Question 7What is the level of measurement for the variable: rating of the overall quality of your campus coffee shop, on a scale from excellent to poor?

1. ordinal

2. nominal

3. interval-ratio

4. none of the above

Question 8Is the interval-ratio for the number of people in your statistics class discrete or continuous?

1. discrete

2. continuous

Question 9Is the interval-ratio for percentage of students who are first-generation college students at your school discrete or continuous?

1. discrete

2. continuous

Question 10Is the interval-ratio for number of hours you study for a statistics exam discrete or continuous?

1. discrete

2. continuous

RES710 Statistical Research Methods And Design I Week 2 Quiz

1. Question 1

What visual presentation goes with nominal data?

1. Pie chart or bar graph

2. Histogram or line chart

3. Both a and b are correct

4. None of the above

Question 2What visual presentation goes with an interval-ratio?

1. Pie chart or bar graph

2. Histogram or line chart

3. Both a and b are correct

4. None of the above

Question 3What visual presentation goes with an ordinal data?

1. Pie chart or bar graph

2. Histogram or line chart

3. Both a and b are correct

4. None of the above

RES710 Statistical Research Methods And Design I Week 5 Quiz Question 1If the city’s shelters have a capacity of 350, will that be enough places for abused women on 95% of all nights?

1. Yes

2. No

Question 2What number of shelter openings will be needed?

1. 250

2. 370

3. 75

4. 374

Question 3The current capacity is only 220 openings because some of the shelters have been closed. What is the percentage of nights that the number of abused women seeking shelter will exceed current capacity?

1. 62.21%
2. 65.54%
3. 34.46%
4. 40%

A criminologist developed a test to measure recidivism, where low scores indicated a lower probability of repeating the undesirable behavior. The test is normed so that it has a mean of 140 and a standard deviation of 40.

Question 4What is the percentile rank of a score of 172?

1. 78.81st percentile
2. 80th percentile
3. 40th percentile
4. 28.81 percentile

Question 5What is the z-score for a test score of 200?

1. -1.50
2. 0.5
3. 1
4. 1.50

Question 6What percentage of scores falls between 100 and 160?

1. 28.81%
2. 53.28%
3. 19.15%
4. 34.13%

Question 7What proportion of respondents should score above 190?

1. 2.753
2. .0125
3. 1.250
4. .1056

Question 8Suppose an individual is in the 67th percentile in this test. What is their corresponding recidivism score?

1. 155.9
2. 140
3. 157.6
4. 112.9
5. According to National Collegiate Athletic Association (NCAA) data, the means and standard deviations of eligibility and retention rates (based on a 1,000-point scale) for the 2013–2014 academic year are presented, along with the fictional scores for two basketball teams, A and B. Assume that rates are normally distributed.

Question 9On which criterion (eligibility or retention) did Team A do better than Team B? Calculate appropriate statistics to answer this question.

1. Team A has better retention and eligibility than Team B.
2. Team B has better retention and eligibility than Team A.
3. Team B has better retention, but Team A has better eligibility.
4. Team A has better retention, but Team B has better eligibility.

Question 10What proportion of the teams have retention rates below Team B?

1. 43.25
2. 4.325
3. 0.4325
4. 0.04325

Question 11What is the percentile rank of Team A’s eligibility rate?

1. 43.25th percentile
2. 36.54th percentile
3. 35.94th percentile
4. 17th percentile

RES710 Statistical Research Methods And Design I Week 6 Quiz Question 1What is the 95% confidence interval for the mean number of years of education for lower-class respondents?

1. 11.60 to 12.62
2. 23.20 to 25.24
3. 5.80 to 6.31
4. 13.60 to 14.62

Question 2What is the 95% confidence interval for the mean number of years of education for working-class respondents?

1. 14.76 to 15.25
2. 12.76 to 13.25
3. 25.50 to 26.50
4. 6.38 to 6.63

Question 3What is the 99% confidence interval for the mean number of years of education for lower-class respondents?

1. 11.44 to 12.78
2. 5.72 to 6.39
3. 13.55 to 14.89
4. 22.88 to 25.56

Question 4What is the 99% confidence interval for the mean number of years of education for middle-class respondents?

1. 18.65 to 19.33
2. 4.65 to 5.33
3. 7.33 to 7.67
4. 14.65 to 15.33

Question 5As our confidence in the result increases, how does the size of the confidence interval change?

1. The confidence interval gets wider, not narrower – increasing confidence leading to less precise intervals.
2. The confidence interval gets narrower, but not wider – decreasing confidence leading to more precise intervals.
3. As the result increases, the confidence level remains the same.
4. As the result increases, the confidence level is reduced.
5. Though 70% of women with children younger than 18 years participate in the labor force, society still upholds the stay-at-home mother as the traditional model. Some believe that employment distracts mothers from their parenting role, affecting the well-being of children. In the GSS 2014, respondents were asked to indicate their level of agreement to the statement, “A working mother hurts children.” Of the 435 male respondents who answered the question, 18% strongly agreed that a working mother does not hurt children.

Question 6What is the 90% confidence interval for this statistic for males?

1. 0.30 to 0.42
2. 0.08 to 0.11
3. 0.15 to 0.21
4. 1.50 to 2.10

Question 7Of the 566 female respondents who answered the question, 40% strongly agreed that a working mother does not hurt children. What is the 90% confidence interval for this statistic?

1. 0.74 to 0.86
2. 0.37 to 0.43
3. 0.14 to 0.18
4. 0.19 to 0.22

According to a report published by the Pew Research Center in February 2010, 61% of Millennials (people born between 1981 and 1996) think that their generation has a unique and distinctive identity (N?= 527). Question 8What is the 95% confidence interval to estimate the percentage of Millennials who believe that their generation has a distinctive identity as compared with the other generations (Generation X, Baby Boomers, or the Silent Generation)?

1. CI = 6.84 to 5.16
2. CI = 50.88 to 60.76
3. CI = 102.84 to 112.16
4. CI = 56.84 to 65.16

Question 9What is the 99% confidence interval?

1. CI = 55.53 to 66.47
2. CI = 111.06 to 132.94
3. CI = 27.77 to 33.24
4. CI = 57.55 to 68.49

Question 10Are both these results compatible with the conclusion that the majority of Millennials believe they have a unique identity that separates them from the previous generations?

1. Yes

2. No

RES710 Statistical Research Methods And Design I Week 7 Quiz Question 1Is there a significant difference between first-and second-generation Hispanic American populations?

1. Yes

2. No

Question 2What is the difference?

1. -2.33
2. 2.33
3. 0.0198
4. 0.07

Question 3Is there a significant difference between first-and second-generation Asian populations?

1. Yes

2. No

Question 4What is the difference?

1. 3.50
2. -3.50
3. 0.0004
4. 0.07
5. In 2016, the Pew Research Center surveyed 1,799 white and 1,001 black Americans about their views on race and inequality. Pew researchers found “profound differences between black and white adults in their views on racial discrimination, barriers to black progress and the prospects for change.” White and black respondents also disagreed about the best methods to achieve racial equality. For example, 34% of whites and 41% of blacks said that “bringing people of different racial backgrounds together to talk about race” would be a very effective tactic for groups striving to help blacks achieve equality (Frankfort-Nachmias, & Leon-Guerrero, 2021, p. 276).

Test whether the proportion of white respondents who support this tactic is significantly less than the proportion of black respondents. Reference: Frankfort-Nachmias, C., & Leon-Guerrero, A. (2021).?Social statistics for a diverse society?(9th ed.). SAGE Publications, Inc.

Question 5What is the null hypotheses?

1. π? ≠ π?

2. π? = π?

3. μ1 = μ2

4. μ1 ≠ μ2

Question 6What is the research hypotheses?

1. π? ≠ π?

2. π? = π?

3. μ1 = μ2

4. μ1 ≠ μ2

Question 7Calculate the Z statistic and test the hypothesis at the 0.05 level. What is the Z statistic?

1. 3.50
2. -3.50
3. 0.0004
4. 0.07

Question 8What is your decision (step 5 in hypothesis testing)? Do you accept or reject the null hypothesis?

1. Accept

2. Reject