Statistical Reasoning Midterm Exam (2023) – Questions & Answers (Graded A+)

Statistical Reasoning Midterm Exam (2023) – Questions & Answers (Graded A+) Statistical Reasoning Midterm Exam (2023) – Questions & Answers (Graded A+) when you are asked to compare two or more dot plots you should do so using SOCS which stands for? - ANSWER - shape, outlier, center, spread A particular data set has a Q1 value of 33 and a Q3 value of 53. Which of the following numbers would be an outlier for this data set? - ANSWER - 2 If a set of data is normally distributed which is the correct measure of the center and spread to use when describing the data set? - ANSWER - mode and range Which of the following are resistant to outliers? - ANSWER - the median and IQR The five number summary of the distrubution of scores on the final exam in Psych 001 last semester was min=18 Q1=39 med=62 Q3=76 max=100. A total of 416 students took the exam. About how many students has scores above 39? - ANSWER - 312 The median grade is in which of the following intervals? - ANSWER - 71-80 A study of effects of television measured how many hours of television each of 125 grade school children watched per week during a school year and their reading scores. Which variable would you put on the horizontal axis of a scatterplot of the data? - ANSWER - hours of television, because it is the explanatory variable The United Nations has data on the percent of adult males and females who are illiterate in 142 countries. The correlation between male illiteracy rate and female illiteracy rate is r = 0.945. This tells us that: - ANSWER - countries with high male illiteracy tend to also have high female illiteracy, and the relationship is very strong A scatterplot and a least-squares regression line are shown in the figure below. If the point (20,25) that is labeled A is removed from the data set, which one of the statements below is TRUE? - ANSWER - the slope will decrease and the y-intercept will increase The correlation between the heights of fathers and the heights of there adult sons is r=.89. If the sons' heights were instead measured in inches, the correlation between heights of fathers and heights of sons would be - ANSWER - unchanged; equal 0.89 You are planning experiment to study the effect of gasoline brand and vehicle weight on the gas mileage of sport utility vehicles. In this study, - ANSWER - gas mileage is a response variable