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. (Round up to the nearest integer.)

Q: In a survey conducted by a reputable marketing​ agency,257 of 1000 adults 19 years of age or older…

A: Sample: Sample is the subset of the subjects chosen from the whole population. In this study, ‘1000…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A:

Q: c. How many of 45 randomly selected employees have a personal messaging frequency less than 170? d.…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: By using the standard normal table, the critical value zα2 at the 99% confidence level is, 2.576.…

Q: You are the operations manager for an airline, and you are considering a higher fare level for…

A: Given : ME< 2.0 σ= 8.0 At 90.0 % confidence level , z score= 1.645 Need to find the minimum…

Q: A programmer is planning to develop a new sohasem system in planning the operating system he will…

A: a)Given data, E=3% =0.03 Let p=0.50 z-value at 99% confidence is Zc=2.576 n=?

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: We have to find sample proportion.

Q: A political scientist is interested in the effect of government type on economic development. She…

A: Observational Stratified study should she use to ensure that countries are selected from each region…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Formula for the sample size needed to estimate a population proportion is

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Given Information:Margin of error, E=1.5%=0.015Confidence level, c=95%=0.95

Q: Readers of the magazine Popular Science were asked to phone in (on a 900 number) their responses to…

A: Answer:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Solution: B. From the given information, confidence level is 0.99, p=0.92 and E=0.02.

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Margin of error (E) = 4.5% = 0.045Significance level (α) = 1 - 0.90 = 0.10

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: The margin of error (E) is 0.04 and the confidence level is 0.90.

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Find z-critical value:…

Q: P(PCC student is Democrat)

A: The probability formula is, Probability=Number of favourable observationsTotal observations A sample…

Q: In October 2017, the Gallup Poll asked a sample of 10281028 U.S. adults, "Are you in favor of the…

A: Given, n=1028 Consider that the population standard deviation is σ, the level of significance is α.…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Sample Size: The formula for the sample size is as follows: Here, zα/2 is the critical value at 99%…

Q: If N is the size of the population and n is the size of the sample, find the sampling fraction?

A: From the provided information, The population size is N and the sample size is n.

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: a)

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: The margin of error (E) is 0.03 and the confidence level is 0.95.

Q: 1. What is a quintile and what do the five quintiles represent in this document? 2. Using an eyeball…

A: 1) A statistical value of any data set representing 20% of the given population is a quintile. In…

Q: West High wants to estimate the number of seniors who plan to go to a  4 -year college. Answer the…

A: a) The correct answer is "50 seniors are randomly selected; 39 plan to go to a 4-year college. Since…

Q: 7) A researcher at a major hospital wishes to estimate the proportion of the adult population of the…

A: Given that, Critical value: Using the z-table, the critical value at 99% confidence level is

Q: Suppose the marketing company did a survey. They randomly surveyed 159 households and found that in…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: A pollster wishes to estimate the proportion of United States voters who favor capital punishment.…

A: Given, 1 - α = 0.98ME =margin of error = 3% = 0.03To find the sample size is needed?

Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month. Part…

A: Solution: a. Let X be the number of oil tankers that had spills and n be the number of tankers. From…

Q: Can you think of an area where it might not be practical, for a variety of reasons, to sample 100%…

A: Yes, there are several areas where we cannot sample 100% of the population being covered to test.

Q: A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On average, how…

A: Given A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Given,margin of error(E)=0.035 α=1-0.90=0.1α2=0.05z0.05=1.645

Q: You are the operations manager for an airine and you are considering a higher fare level for…

A: Given that the confidence level is 90% and the margin of error is 1.5%. From the standard normal…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: Martha Quinn is interested in the proportion of fast to slow songs she will play today. She takes…

A: We know that Simple Random sampling is a sampling technique in which every unit of the population…

Q: Given the above population, what is the P(Female|Bachelor's OR more in educational attainment)?…

A: Introduction: Suppose A and B are two events, with respective probabilities P (A) and P (B). Denote…

Q: Suppose the marketing company did a survey. They randomly surveyed 145 households and found that in…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of a population…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: a) From the given information, Margin error = 0.055 Assume sample proportion = 0.5   Critical value:…

Q: An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars…

A: Given Information: A random sample of 1164 new car buyers is drawn. Of those sampled 325 preferred…

Q: . In preparing a report on the economy, we need to estimate the percentage of business that plan to…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Given that  Margin of error =E =5.5%=0.055 90% confidence.

Q: Suppose the marketing company did a survey. They randomly surveyed 159 households and found that in…

A: Given Data Sample Size, n = 159 Number of successes, x = 109.0 Significance level,…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Find z-critical value:…

Q: Anews service conducted a survey of 1049 adults ages 18 years or older in a certain country. August…

A: Given, The results of a survey, On the basis of the results, we need to say the research objective,…

Q: A school principal claims that the numeracy rate of the senior high school students in his school is…

A: Given p=0.6, pcap=200/500=0.4, n=500, alpha=0.05 1. H0:p=0.60 vs H1:p!=0.60 2) alpha=0.05 3) Test…

Q: A programmer is planning to develop a new sohasem system in planning the operating system he will…

A: Given data: Confidence level = 99% Margin of error = 3 % = 0.03 To find the  required sample size.

Q: A study was conducted to determine whether automobile repair charges are higher for female customers…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Answer can be given from sample size formulae.

Q: As part of a statistics project, a teacher brings a bag of marbles containing 700 white marbles and…

A: Given data: Bag of marbles containing 700 white marbles and 300 red marbles