Test: Unit 3 Test [Sections 6.2,6.3,6.5 &7.2-7.3] Tne Rema This Question: 1 pt T

Question

Test: Unit 3 Test [Sections 6.2,6.3,6.5 &7.2-7.3] Tne Rema This Question: 1 pt Time Remaining: 01 54 53 Submit Test use a new operating system How many computers must be surveyed in order to be 95% confident that his esmateisinemor by no morethan Me percentage points? Complete parts (a) through (c) below (Round up to the nearest integer) b)Assume that a recent survey suggests that about 93% of computers use a new operating system (Round up to the nearest integer ) c) Does the additional survey information from part (b) have much of an effect on the sample size that is required A. Yes, using the addional survey information hom part (b) dramatically inreases the sangle so survey information from part (b) does not change the sample sice O C. No, using the D. No, using the additional survey information from part (t) only slightly nouses he sample size. Quiz

Explanation / Answer

A) here margin of error E =0.05

and for 95% CI ; z=1.96

for no estimate p=0.5

therefore sample size n =p(1-p)*(Z/E)2 =385

b)for here p=0.93

sample size n =p(1-p)*(Z/E)2 =101

c)option B is correct

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