statistics firm obtains a list of all cars in the U. S. that are registered with state DMV offices and randomly selects 81 cars from the list. For this sample, the average weight is found to be 2919 pounds with a standard deviation of 540 pounds. Calculate the 90% confidence interval for the parameter of interest and interpret it.

Which system of linear inequalities is represented by the graph?

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 exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)