Exam 4: Central Tendency and Dispersion
Exam 1: Introduction43 Questions
Exam 2: Data Sets39 Questions
Exam 3: Frequency Tables and Univariate Charts37 Questions
Exam 4: Central Tendency and Dispersion58 Questions
Exam 5: Creating New Variables47 Questions
Exam 6: Comparing Group Means25 Questions
Exam 7: Crosstab Tables37 Questions
Exam 8: Nominal and Ordinal Measures of Association38 Questions
Exam 9: Pearsons Correlation and Bivariate Regression48 Questions
Exam 10: Multiple Regression39 Questions
Exam 11: Sampling Distributions and Normal Distributions40 Questions
Exam 12: Hypothesis Testing and One-Sample T Tests45 Questions
Exam 13: Paired and Independent-Samples T Tests49 Questions
Exam 14: Analysis of Variance49 Questions
Exam 15: Chi-Square39 Questions
Exam 16: Hypothesis Testing With Measures of Association and Regression32 Questions
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You want a measure of central tendency for an ordinal level variable. You want the measure that makes use of the fact that the attributes are not only different but also have rank order. What statistic would you calculate?
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(Multiple Choice)
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Correct Answer:
B
A researcher takes a sample of three students from a playground and asks each of them what grade they are in. The students' answers are 3, 3, and 3. What is the variance for this data?
variance: __________
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(Short Answer)
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Correct Answer:
0
A researcher takes a sample of three students from a large class and asks each of them how many times they ate at a fast food restaurant so far this week. The three students' answers are 0, 4, 8. What is the variance for this data? It might help you to know that the standard deviation is 4.
variance: _________
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(Short Answer)
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Correct Answer:
16
If the mean on an exam was 75 and the standard deviation was 5, what do you know about the distribution of exam grades around the mean?
(Essay)
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A variable has a standard deviation of 4. What is the value of its variance?
variance: __________
(Short Answer)
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Five college students have the following number of TV shows they watch regularly: 0, 0, 3, 4, 8. Compute the following statistics based on these values:mean: _____ median: _____ mode: _____
range: _____ minimum: _____ 50th percentile: _____
(Short Answer)
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You want to see the mode and percent distribution for a variable. Which SPSS procedure would be most appropriate?
(Multiple Choice)
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What univariate statistics are usually used to describe the distribution of cases on an ordinal variable?
(Short Answer)
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Six college students have the following number of TV shows they watch regularly: 0, 1, 3, 3, 5, 6. Compute the following statistics based on these values:mean: _____ median: _____ mode: _____
range: _____ minimum: _____ maximum: _____
(Short Answer)
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It is customary when describing the scores on an interval/ratio variable to report the values of which four statistics?
(Multiple Choice)
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You want to see the mean, standard deviation, minimum, and maximum for a variable. Name one SPSS procedure that would give you this.
(Short Answer)
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Answer the question that follows this SPSS output:
What is the mode? _______________
(Short Answer)
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You want to see the median, minimum, and maximum for a variable. Name one SPSS procedure that would give you this.
(Short Answer)
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It is customary when describing the scores on an ordinal variable to report the values of which three statistics?
(Multiple Choice)
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What univariate statistics are usually used to describe the distribution of cases on a nominal variable?
(Short Answer)
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Answer the questions that follow this SPSS output:
A) What is the value of the mode for this variable? __________
B) What is the value of the median for this variable? __________
C) What is the value of the minimum for this variable? __________
D) What is the value of the 25th percentile for this variable? __________
(Short Answer)
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The admissions office has ordinal-level data on parental income levels of enrolled students. What would an appropriate measure of central tendency be to report?
(Multiple Choice)
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If an ordinal variable has nine attributes, is the fifth attribute always the median? Explain your answer.
(Essay)
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