Aresearcher tries to compare grades earned on the first quiz by boys and girls. he randomly chooses 10 students from boys and 15 students from girls and calculates the confidence interval on difference between means. how many degrees of freedom will you get in this t distribution?

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

The volume of the a sphere whoes diameter is 18 cm is cubic cm . if it's diameter were reduced by half, it's volume would be of its original volume