WGU C955 - Module 5: Descriptive Statistics for Two Variables Questions and Answers with complete solution

The relationship between the two variables on a scatterplot can be measured by what statistic? {{ Scatterplot of sales on the x-axis and profit index on the y-axis. }} a Correlation coefficient ( r ) b Regression c ANOVA d Chi-square - Answer Correlation coefficient ( r ) A study was completed to investigate if commutes of longer than 30 minutes increased the risk of burnout. The results of the study are in the table below. ,Lenth of Commute ,<30 Minutes ,>30 Minutes ,Total Risk of Burnout ,Negative for Burnout ,185 ,72 ,257 ,Positive for Burnout ,98 ,247 ,345 ,Total ,283 ,319 ,602 What percentage of commuters with commutes greater than 30 minutes expressed being burned out? a 66.39% b 77.43% c 81.62% d 70.74% - Answer 77.43% Describe the relationship of the two variables on the scatterplot.{{ Scatterplot displaying data points with advertising dollars on the x-axis and units sold on the y-axis. The data points are tightly clustered in a pattern that slopes upward from right to left in a non-linear fashion. }} a Weak negative b Strong negative c Weak/No relationship d Non-linear/Curved relationship - Answer Non-linear/Curved relationship What percentage of connections using Service Provider A were suspicious? Web Hosting Service Service Provider A Service Provider B Total Web Server Safe Connections 87 14 101 Suspicious Connections 37 89 126 Total a 13.6% b 29.8% c 70.2% d 86.4% - Answer 29.8% Out of the total number of connections, what percentage of safe connections were reported by Service Provider A? Web Hosting Service Service Provider A Service Provider B Total Web Server Safe Connections 87 14 101 Suspicious Connections 37 89 126 Total a 6.2% b 16.3% c 38.3% d 39.2% - Answer 38.3%