Quiz_ Central Tendency, Variability, and Correlation_ EDUC606_ Tests and Measurements (D02)

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606

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Economics

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Jan 9, 2024

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Quiz: Central Tendency, Variability, and Correlation Due Aug 1 at 11:59pm Points 30 Questions 10 Time Limit 60 Minutes Allowed Attempts Unlimited Instructions Attempt History Attempt Time Score LATEST Attempt 1 10 minutes 18 out of 30 Correct answers are hidden. Score for this attempt: 18 out of 30 Submitted Aug 6 at 10:51pm This attempt took 10 minutes. The quiz: Covers the Textbook material from Module 5: Week 5 . Contains 10 multiple-choice questions. Is limited to 60 minutes . Allows unlimited attempts and the highest attempt will count towards the grade. Is worth 20 points . You may refer to your notes and textbooks at any time during the assessment. Submit this assignment by 11:59 p.m. (ET) on Sunday of Module 5: Week 5. TAKE THE QUIZ AGAIN 0 / 3 pts Question 1 Incorrect Incorrect The distribution below is : negatively skewed. normal. positively skewed.
rectangular. 3 / 3 pts Question 2 With which term is the mean synonymous? Average Frequency Interval Midpoint 3 / 3 pts Question 3 In a frequency distribution of 290 scores, the mean is 99 and the median is 86. One would expect this distribution to be: negatively skewed. normal. positively skewed. symmetrical. 3 / 3 pts Question 4 Which of the following fall(s) at a z-score of 0.0 in a normal distribution? Mean Median Mode
Mean, media and mode 3 / 3 pts Question 5 The most dependable derived unit for measuring how far a score varies from the mean for the group is called the: average deviation. quartile deviation. standard error. standard deviation. 0 / 3 pts Question 6 Incorrect Incorrect Assume that a set of 90 normally distributed test scores has a mean of 70 and a standard deviation of 10. Which of the following represents the highest degree of relative performance? A percentile rank of 20 A raw score of 67 A T-score of 35 A z-score of - 1.2 3 / 3 pts Question 7 In a normal distribution, what percentage of scores will fall between -1 standard deviation and +1 standard deviation? 34% 50%
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68% 84% 0 / 3 pts Question 8 Incorrect Incorrect The coe±cient of determination is used to: compute correlations for truncated ranges. compare the relative strength of coe±cients. identify curvilinear relationships. test correlations for causality. 3 / 3 pts Question 9 A research worker gave a scholastic aptitude test to a sample of eighth graders. Then he correlated the aptitude test scores with the chronological ages of the subjects. He found a correlation of - .42. How should this result be interpreted? He obviously made a computational error. His sample was composed of pupils with low academic potential. The older members of the grade tended usually to be pupils with low academic potential and vice-versa. The relationship between age and intelligence decreases as people reach the age of 14. 0 / 3 pts Question 10 Incorrect Incorrect When a relationship between two variables is curvilinear, a linear correlation coe±cient computed for each data will be:
a determination coe±cient. spuriously high. spuriously low. truncated. Quiz Score: 18 out of 30

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