Mrs. Najjar is comparing the means of her two Chemistry class on their unit 1 postttest. Her null hypothesis is that there is no difference between the scores for the two classes. The difference in the sample means is 40 points with a standard deviation of the difference of the sample mean of 15 points. What is the 68% confidence interval – how much would you add or subject from the mean AND find the actual interval?

what i would say the best answer is a. 40.5

(0,,,0)

step-by-step explanation:

the table of x and y values is shown in the attached pic(part of question)

we have to decide according that graph

given points are (0, 0) (–1, 0), (2, 0)

when we graph these points on graph they show an increasing line as shown in the attached pic

answer: a) 56% women

b)44% men

step-by-step explanation:

b. hoped i'm right lol

step-by-step explanation: