Some iq tests are standardized based on the assumption that the population mean is 100 and the standard deviation is 15. test graders decide to reject this hypothesis if a random sample of 25 people has a mean iq greater than 110. assuming that iq scores are normally distributed, what's the power of the test if the true population mean is 105?

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.

Triangle knm is what is true about the sides of knm

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?