3. Debbie, an architect, is designing the interior doors to a new sports bar. She wants the doors to be high enough so that 90% of the men using the doors will have at least one foot
clearance. Assuming the heights to be normally distributed with a mean of 69 inches and a
standard deviation of 4 inches, how high must Debbie design the doors to satisfy her
requirements?

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.