Showing all 3 results

Sale!
A true/false test has 90 questions. A passing grade is 59% or more correct answers. Find the approximate probability that a person who is just guessing will pass the test.
$2.00$1.00Question: A true/false test has 90 questions. A passing grade is 59% or more correct answers. Find the approximate probability that a person who is just guessing will pass the test.

Sale!
Suppose that 32% of all users the Infinity Affinity Web site drink diet soft drinks regularly
$2.00$1.00Question:
Suppose that 32% of all users the Infinity Affinity Web site drink diet soft drinks regularly. What is the probability that in survey of a randomly selected sample of 200 of the site’s users, the proportion who say that they drink diet soft drinks regularly will be 40% or less? (Show your work. As part of your answer, you should confirm that the sampling distribution of p is approximately Normal.)

Sale!
Curing diabetes: Vertical banded gastroplasty is a surgical procedure that reduces the volume of the stomach
$2.00$1.00Question
Curing diabetes: Vertical banded gastroplasty is a surgical procedure that reduces the volume of the stomach in order to produce weight loss. In a recent study, 82 patients with Type 2 diabetes underwent this procedure, and 59 of them experienced a recovery from diabetes. Does this study provide convincing evidence that greater than 58% of those with diabetes who undergo this surgery will recover from diabetes? Use the a = 0.10 level of significance and the Pvalue method with the TI84 calculator. Source: New England Journal of Medicine 357:753761
State the null and alternate hypotheses.
Но: р (select)______
H1 p (select) ______
This hypothesis test is a (select) test