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 90​% confident that his estimate is in error by no more than three percentage points? ​a) Assume that nothing is known about the percentage of computers with new operating systems. n= ​b) Assume that a recent survey suggests that about 91​% of computers use a new operating system. n=

A researcher wants to determine the percentage of American teenagers who send or receive text messages while doing homework. Which of the following techniques would likely be the MOST efficient way of obtaining an accurate estimate for this percentage? 1. Randomly select teenagers from the list of all teenage students in every state in America and mail surveys to those teens, asking them if they send or receive text messages while doing homework. 2. Send a survey to every teenager in America and ask them if they send or receive text messages while doing homework. 3. Randomly select teenagers from the list of all teenage students in one state and mail surveys to those teens, asking them if they send or receive text messages while doing homework.

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 99​% confident that his estimate is in error by no more than three percentage points? Complete parts​ (a) through​ (c) below.   ​a) Assume that nothing is known about the percentage of computers with new operating systems. n = b) Assume that a recent survey suggests that about 98​% of computers use a new operating system.n = c) Does the additional survey information from part​ (b) have much of an effect on the sample size that is​ required?

The distribution of hemoglobin in grams per deciliter of blood if approximately N(14,1) in women and approximately N(16,1) in men. Use software or Table B to find the answers. A) What percent of women have more hemoglobin than the men's mean hemoglobin? B) What percent of men have less hemoglobin than the women's mean hemoglobin? C) What percent of men have more hemoglobin than the women's mean hemoglobin?

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 99​% confident that his estimate is in error by no more than three percentage points? Complete parts​ (a) through​ (c) below.       Question content area bottom Part 1 ​a) Assume that nothing is known about the percentage of computers with new operating systems.   n=enter your response here ​(Round up to the nearest​ integer.) Part 2 ​b) Assume that a recent survey suggests that about 90​% of computers use a new operating system.   n=enter your response here ​(Round up to the nearest​ integer.) Part 3

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 99% confident that his estimate is in error by no more than four percentage points? 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.)

3rd

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 99​% confident that his estimate is in error by no more than two percentage points question mark Complete parts​ (a)  a) Assume that nothing is known about the percentage of computers with new operating systems.