Statistics Mid-term Questions & Answers

Statistics Mid-term Questions & Answers ______are the categories by which data are grouped. - ANSWER: Classes _____statistics consists of organizing and summarizing information collected, while ______statistics uses methods that generalize results obtained from a sample to the population and measure the reliability of the results. - ANSWER: Descriptive; inferential (Describe what the line will look like) Match the coefficient of determination to the scatter diagram. The scales on the x-axis, and yaxis are the same for each scatter diagram (a R^2 =1 (b R^2=0.90 (c R^2=0.62 - ANSWER: a= straight line b= some what straight line c= scattered (Part of another question) An engineer wants to determine how the weight of a car......... Interpret the slope and intercept, if appropriate. Is the value above or below average? - ANSWER: -The slope indicates the average change in miles per gallon for an increase of 1 pound in weight -It is not appropriate to interpret the y-intercept because it is outside the scope of the model -It is below average (part of another question) Are there any outliers in the given data set? What are the outliers? (Lower fence is -2.728) (Upper fence is 9.053) - ANSWER: -No, all the values are between the lower and upper fences -There are no outliers (part of another question)