Exam 3
Exam 3 Due May 21 at 11:59pm Points 50 Questions 17 Available May 15 at 12am - May 21 at 11:59pm Time Limit 180 Minutes Instructions All exams are cumulative. You have 180 minutes to complete the exam. You must show all your work in order to earn full credit. This quiz was locked May 21 at 11:59pm. Attempt History * Some questions not yet graded Correct answers are no longer available. Score for this quiz: 29 out of 50 * Submitted May 19 at 7:59pm This attempt took 46 minutes. Question 1 1 / 1 pts A scatter diagram is also called a random distribution frequency plot. is a bar graph that shows the frequencies of the different values in a distribution. is a line graph that looks like a mountain-peak skyline and shows the frequencies of the different values in a distribution. shows the relation of two variables as dots in a two-dimensional graph. Question 2 1 / 1 pts The items below are based on the following scenarios. Which graph depicts a negative correlation? Scenario B Scenario A Scenario D Scenario C Question 3 1 / 1 pts The difference between a positive correlation and a negative correlation is that in a negative correlation, high scores go with high scores and low with low; in a positive correlation, high scores go with low scores and low with high. negative correlations represent a weak relationship; positive correlations represent a strong relationship. in a negative correlation, high scores go with low scores and low with high; in a positive correlation, high scores go with high scores and low with low. negative correlations are curvilinear; positive correlations are straight lines. Question 4 1 / 1 pts When figuring a correlation coefficient, the absolute value of the summed cross-products gets smaller as the variance of the scores for each variable increases.