You are evaluating the effectiveness of improvements your company has made to a new mobile app. the 95% confidence interval for the difference between the proportion of users who prefer the old version and the proportion who prefer the new version is 0.043 ± 0.094. at the 0.05 level of significance, should you reject the null hypothesis that there is no difference between the proportions?

Sadie computes the perimeter of a rectangle by adding the length, l, and width, w, and doubling this sum. eric computes the perimeter of a rectangle by doubling the length, l, doubling the width, w, and adding the doubled amounts. write an equation for sadie’s way of calculating the

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −