Arthur is conducting a study on the preferred study options of students from East County College. He randomly selected 28 students from the college, and found that 25% of those surveyed preferred studying abroad. Assuming a 95% confidence level, which statement holds true? A.
As the sample size is appropriately large, the margin of error is 0.178.
B.
As the sample size is appropriately large, the margin of error is 0.15.
C.
As the sample size is too small, the margin of error cannot be trusted.
D.
As the sample size is too small, the margin of error is 0.15.

In parallelogram abcd the ratio of ab to bcis 5: 3. if the perimeter of abcd is 32 find ab

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.