PSYC 312 STEINBERG QUIZ 1

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Regent University *

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312

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Statistics

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Apr 3, 2024

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core for this quiz: 100 out of 100 Submitted Mar 17 at 10:47am This attempt took 19 minutes. Question 1 4 / 4 pts You are interested in the average reading achievement test score of the currently enrolled students in Edison Elementary School. The average score of just Ms. Grady's class would be referred to as a: sample population statistic parameter Question 2 4 / 4 pts Another name for a subject is a case. True False Question 3 4 / 4 pts A summary number for a population is called a statistic. True False Question 4

4 / 4 pts A bar over a letter indicates an average. True False Question 5 4 / 4 pts Assume that q = .25. What is p ? .25 .75 .25 1/25 Question 6 4 / 4 pts Four kinds of carbonated soft drinks form what type of measurement scale? Nominal Interval Ordinal Ratio Question 7 4 / 4 pts The number of miles you walk on a hike forms what type of measurement scale? Nominal

Ordinal Interval Ratio Question 8 4 / 4 pts Which of the following is the best example of ratio data? Age Gender Rank on a civil service test Level of intelligence Question 9 4 / 4 pts The statement that a person who scores 120 has twice as much of the trait being measured as someone who scores 60 is appropriate for a variable measured on an interval scale. a variable measured on a ratio scale. any continuous variable. any test whose scores are normally distributed. Question 10 4 / 4 pts Which of these is a discrete measure? How many points you earn on a test.

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How many inches you grew in a year. How many children you have currently. How many hours you study for an exam. Question 11 4 / 4 pts A bimodal distribution, most often, indicates that each subject scored both high and low on whatever is being measured. there is a subset of high-scoring subjects and a subset of low-scoring subjects in the distribution. the majority of the subjects scored close to average. the person who measured the subjects made an error. Question 12 4 / 4 pts A scores distribution is symmetric and concentrated in the center, with very few scores in either tail. The distribution is platykurtic leptokurtic positively skewed negatively skewed Question 13 4 / 4 pts If you sum a set of frequencies, you get the variance. relative frequency.

sample size. recommended interval width. Question 14 4 / 4 pts If you sum a complete set of relative frequencies, you get 0. 100%. the sample size. the range of scores. Question 15 4 / 4 pts Examine the following table. Then answer the question that follows: Score Freq. Rel. Freq. 10 1 9 3 8 3 7 2 5 1 What is the relative frequency for a score of 9? .30 1/3 3

4 Question 16 4 / 4 pts Jane’s percentile rank on a science exam is 78. This means that Jane answered 78% of the questions correctly on the exam. Jane’s score was equal to or greater than 78% of the other students’ scores. Jane achieved a score of 78 on the exam. Jane scored the same as 78 other students. Question 17 4 / 4 pts Assume you are creating a frequency table for a set of data. You are deciding whether to leave the data as is, or to group it into score intervals. In making this decision, what should your guiding principle be? Clarity—do the groupings make the data easier to interpret? Precision—do the groupings change the scores or their frequencies? Ease—how much time and inconvenience will a grouped table take to create? Utility—can a grouped table be used for whatever purpose an ungrouped table would have been used for? Question 18 4 / 4 pts Examine the following stem-and-leaf display. 5 3 6 6 6 4 6 7 7 4 4 5 8 8 8 1 3 3 3 4 5 5 5 5 6 9 9 9

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9 1 2 5 6 6 8 What is the lowest score? 5 36 53 536 Question 19 4 / 4 pts If there are many more low scores than high scores, the line graph of scores will be: negatively skewed. positively skewed. platykurtic. leptokurtic. Question 20 4 / 4 pts If there are many more high scores than low scores, the line graph of scores will be: negatively skewed. positively skewed. platykurtic. leptokurtic. Question 21

4 / 4 pts Your data consist of the average annual household income for all families living in each of 10 different residential sectors of a city. What type of visual display would best convey the data? Histogram Line graph Bar chart Frequency table Question 22 4 / 4 pts In a histogram, frequency is indicated by the width of the bar. True False Question 23 4 / 4 pts In the set of scores 2, 4, 5, 7, 9, the score at the 50th percentile is 5. True False Question 24 4 / 4 pts An ordinal scale is the lowest measurement scale. True

False Question 25 4 / 4 pts You are interested in the average reading achievement test score of the currently enrolled students in Edison Elementary School. The children in Edison Elementary School would be referred to as a: sample population statistic parameter Quiz Score: 100 out of 100 Previous Next

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