The following data gives the number of hours 7 students spent studying and their corresponding grades on their midterm exams. Hours Spent Studying 1 1.5 2 2.5 3.5 4 6
Midt erm Grades 66 75 78 81 87 90 93

Required:
a. Calculate the correlation coefficient, r.
b. Determine if r is statistically significant at the 0.01 level
c. Determine if r is statistically significant at the 0.05 level
d. Calculate the coefficient of determination, r^2.

Avegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide. find the total area of the vegetable garden and path

Acylinder has volume 45π and radius 3. what is it’s height?

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .