On a standardized exam, the scores are normally distributed with a mean of 195 and a standard deviation of 10. Find the z-score of a person who scored 199 on the exam.

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

Which expression is rational? 6. , square root two, square root 14, square root 49

To decrease an amount by 16% what single multiplier would you use