Quiz on Statistics: Frequency Tables and Graphs Essentials

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Quiz: Introduction to Statistics, Frequency Tables, and Graphs Due Oct 30 at 11:59pm Points 60 Questions 20 Time Limit 60 Minutes Instructions Attempt History Attempt Time Score LATEST Attempt 1 24 minutes 57 out of 60  Correct answers are hidden. Score for this quiz: 57 out of 60 Submitted Oct 30 at 7:38pm This attempt took 24 minutes. The quiz: Covers the Textbook material from Module 1: Week 1 . Contains 20 multiple-choice and true/false questions. Is limited to 60 minutes . Allows 1 attempt . Is worth 60 points . Submit this assignment by 11:59 p.m. (ET) on Monday of Module 1: Week 1. 3 / 3 pts Question 1 Sarah is conducting a research study in which one group of participants consume one cup of coffee, whereas another group of participants consume two cups of coffee. Then, she assesses attention levels of these participants following coffee consumption. This is an example of a(n) _____ research study. descriptive correlational Sign In

quasi-experimental experimental 3 / 3 pts Question 2 A data set is described as consisting of N = 15 scores. Based on the notation being used, the data set is a sample and contains data from a subset of the population. True False 3 / 3 pts Question 3 Barbara is a psychologist who measures relationship satisfaction among couples by observing non-verbal behavior (e.g., smiling, mimicking partner actions). In this example, non-verbal behavior is an example of a(n) _____. discrete variable. operational de±nition. construct. real limits. 3 / 3 pts Question 4 A group of quiz scores ranges from 3 to 10, but no student had a score of X = 7. If the scores are put in a frequency distribution table, X = 7 would not be listed in the X column.

True False 3 / 3 pts Question 5 A researcher uses an anonymous survey to investigate the television- viewing habits of 100 American adolescents. The researcher plans to make an inference about the television-viewing habits of all American adolescents based on the results of the survey. The entire group of American adolescents is an example of a _____. sample. statistic. population. parameter. 3 / 3 pts Question 6 If a set of scores for a variable is displayed in a frequency distribution polygon, which scale of measurement was used to measure the variable? nominal or ordinal ordinal or interval ratio or ordinal interval or ratio

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0 / 3 pts Question 7 Incorrect Incorrect Smooth curves and relative frequencies are more often used to describe population than sample data. True False 3 / 3 pts Question 8 To determine the size of a difference between two individuals on a measured variable, a researcher must use either an interval or a ratio scale of measurement. True False 3 / 3 pts Question 9 Which of the following is a critical unique aspect of the experimental method when examining the relationship between two variables? manipulation of one variable prediction of one variable manipulation of two variables prediction of two variables

3 / 3 pts Question 10 Lauren is a psychologist interested in whether observing helpful actions while consuming media causes greater future helping behavior. She designs a research study in which one group of participants watch a pleasant television show depicting people helping others for 20 minutes, whereas a second group of participants watch a pleasant television show for 20 minutes where no helping behavior takes place. After watching the show assigned to them, participants in each group are then provided the opportunity to help another student who drops a folder of papers, and Lauren records whether each participant helps this other student or not. In this research study, the control condition is _____. the group of participants who watch the pleasant television show for 20 minutes where no helping behavior takes place. the group of participants who watch the pleasant television show for 20 minutes where helping behavior takes place. the participants that help the student who drops the folder of papers. the participants that do not help the student who drops the folder of papers. 3 / 3 pts Question 11 A recent study uncovered a correlation between gum disease and heart disease. This result indicates that gum disease causes individuals to develop heart disease. True False

3 / 3 pts Question 12 If a set of scores is displayed using a smooth curve, which scale of measurement was used to measure the scores? nominal interval nominal or ordinal interval or ratio 3 / 3 pts Question 13 Using the frequency distribution table below, what is the proportion of individuals that scored a 4? X f 6 4 5 3 4 7 3 2 2 2 1 2 .2 .7 .35 .1 3 / 3 pts Question 14

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How many individual scores are in the following distribution? N = 5 N = 6 N = 10 N = 4 3 / 3 pts Question 15 What is the value of Σ X for the scores 2, 4, and 5? 2 11 45 36 33 3 / 3 pts Question 16 For the data in the following table, what is the value of Σ X ? X f

4 1 3 0 2 2 1 1 4 9 10 13 3 / 3 pts Question 17 For the following data, N = _____. X f 4 2 3 3 2 1 1 2 8. 10. 20. 18. 3 / 3 pts Question 18 In a grouped frequency distribution table, one interval is listed as 35-39. If the scores represent a continuous variable, what are the real limits for this interval?

34.5 and 39.5 35.5 and 39.5 34 and 40 35.25 and 39.25 3 / 3 pts Question 19 If the following grouped frequency distribution table pertaining to a continuous variable were shown in a histogram, the width of the bar above the 15-19 interval would reach from _____ to _____. X f 20-24 2 15-19 5 10-14 4 5-9 1 X = 14.5 to X = 19.5 X = 15.5 to X = 18.5 X = 15.5 to X = 19.5 X = 15.0 to X = 19.0 3 / 3 pts Question 20 What is the total number of scores for the distribution shown in the following table? X f 4 7 3 5 2 4 1 2

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4 10 18 39 Quiz Score: 57 out of 60

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