Data set x and data set y both have the same interquartile range. if the first quartile of data set x is less than the first quartile of data set y, then the third quartile of data set x is greater than the third quartile of data set y. true or false?

Ill mark the brainliest if you me with the these three questions 7,8,9

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.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?