Two weights, each labeled as weighing 100 g, are each weighed several times on the same scale. The results, in units of μg above 100 g, are as follows: First weight: 54 88 89 62 39 66 Second weight: 28 39 28 2 49 Since the same scale was used for both weights, and since both weights are similar, it is reasonable to assume that the variance of the weighing does not depend on the object being weighed. Can you conclude that the weights differ? Find the P-value and state a conclusion. Since , we conclude that the weights differ.

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Each equation given below describes a parabola. which statement best compares their graphs? x = 2y^2 x = 8y^2

For the equations below which statement is true ? -2x=14 6x=-42