Bones brothers & associates prepare individual tax returns. over prior years, bones brothers has maintained careful records regarding the time to prepare a return. the mean time to prepare a return is 90 minutes, and the population standard deviation of this distribution is 14 minutes. suppose 100 returns from this year are selected and analyzed regarding the preparation time. what is the probability that the mean time for the sample of 100 returns for this year is greater than 92?

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.

Through non-collinear points there is exactly one plane.

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.