Question

10. A programmer plans to develop a new software system. In planning for the operating system that he will​ use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 95​% confident that his estimate is in error by no more than three percentage points question mark Complete parts​ (a) through​ (c) below.

​a) Assume that nothing is known about the percentage of computers with new operating systems.

N=_____

​(Round up to the nearest​ integer.)

​b) Assume that a recent survey suggests that about 89​% of computers use a new operating system.

N=____

​(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.No, using the additional survey information from part​ (b) does not change the sample size.

B.Yes, using the additional survey information from part​ (b) dramatically increases the sample size.

C.Yes, using the additional survey information from part​ (b) dramatically reduces the sample size.

D.No, using the additional survey information from part​ (b) only slightly

Answer 1