Four students did a survey to find the ice cream flavor sixth-grade students prefer. the table below shows the method each student used to conduct the survey:

jane asked 100 sixth-grade students at random what their favorite ice cream flavor is

ken asked 100 students at random from his seventh-grade class what their favorite ice cream flavor is

sasha asked 100 eighth-grade students at random what their favorite ice cream flavor is

kevin asked 100 third-grade students at random what their favorite ice cream flavor is

which student's survey is most likely not biased?
jane
ken
sasha
kevin

Plzzz i beg u so much asap ! what is the slope of this line? enter your answer in the box.

Which function has the domain x> -11

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.