Scores on a test have a mean of 67 and Q3 is 85. The scores have a distribution that is approximately normal. Find the standard deviation. Round your answer to the nearest tenth.

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.

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2

The length of a rectangle plus its width is 24 cm. the area is 143 square cm. what are the length and width of the rectangle?