Math 227 - Statistics » Winter 2021 » Quiz Sec 10.2

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Question #1
A computer software magazine compares the rates of malware infection for computers protected by security software A with the rates of infection for computers protected by software B. They found that out of 794 computers with security software A, 24 became infected with some type of malware after 1000 hours of internet interaction. For security software B, 47 out of 522 computers became infected after 1000 hours of internet interaction. Assuming these to be random samples of infection rates for the two security software packages, construct a 95% confidence interval for the difference between the proportions of infection for the two types of security software packages. Answer We are 95% confident that the difference between the proportions of infection for the two types of security software packages is between _______ and_______ . Round your answers to three decimal places.
A.   -0.087 and -0.033
B.   -0.078 and -0.033
C.   -0.087 and -0.330

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