Answered: In a study of a proposed treatment for…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a study of a proposed treatment for diabetes prevention, 339 people under the age of 20 who were thought to be at high risk of developing type I diabetes were assigned at random to two groups. One group received twice-daily injections of a low dose of insulin. The other group (the control) did not receive any insulin, but was closely monitored. Summary data are given below.

Group	n	Number Developing Diabetes
Insulin	169	41
Control	170	40

(a)

Use the given data to construct a 90% confidence interval for the difference in the proportion that develop diabetes for the control group and the insulin group. (Use ?_Insulin − ?_Control. Round your answers to three decimal places.)

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