QUESTION 15 Sonia took a history exam and received an exam grade that had a zscore of +3.00. How would you described Sonia's performance on this exam? 0 Sonia received an unusually high grade 0 Sonia received an unusually low grade 0 Sonia received an approximately average grade 0 It's impossible to know how Sonia scored relative to her classmates with this information QUESTION 16 "Given a population mean of 100 and a standard deviation of 13, what raw X score would a zscore of +1.5 correspond to?" O 80.5 0 100 0 119.5 0 cannot be determined with this information QUESTION 17 The shape of a distribution will usually change when you transform the original distribution into a distribution of z-scores. 0 True 0 False QUESTION 18 Why is it useful to transform raw values on X into z-scores? 0 because it makes the numbers smaller so they're easier to plug into equations 0 it standardizes the distribution so that you can meaningfully compare scores that had different original scales of measurement 0 it's an easier name to remember 0 that's the only way you can analyze the data in statistical softwares QUESTION 19 How would you describe a score on an IQ test that had a zscore of -0.50? 0 this IQ score is slightly above average 0 this IQ score is slightly below average 0 this IQ score is much higher than the average 0 this IQ score is much lower than the average