We need to estimate the percentage of businesses that plan to hire additional employees in the next 60 days.  a) How many randomly selected employers must we contact in order to create an estimate in which we are 95% confident with a margin of error of 6%? b) Suppose we want to halve the margin of error. What sample size will suffice?

Q: If you want a poll to have a margin of error of 2.84%, how large will your sample have to be?

A:

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

A:

Q: According to statistics reported on CNBC, a surprising number of motor vehicles are not covered by…

A: sample size(n)=218No. vehicles were not covered by insurance(x)=33

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

A: (a) Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use…

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

A: Here the parameter, p determines the true proportion (or percentage) of the computers that use a new…

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

A: Given: Margin of error = 4% Confidence level = 99%

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

A:

Q: I want to estimate the proportion of college professors who believe in aliens. How many college…

A: It is given that margin of error (E) is 0.05 and the confidence level is 0.95.

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

A:

Q: A poll in Canada states that 67% of all respondents favor imposing the death penalty. The poll was…

A: Given that - A poll in Canada states that 67% of all respondents favor imposing the death penalty.…

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

A: From the provided information, Margin of error (E) = 0.03 Confidence level = 95%

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

A:

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

A: Given,margin of error(E)=0.055

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

A: a)

Q: n IQ test is designed so that the mean is 100 and the standard deviation is 16 for the population of…

A: Given: μ=100, σ=16 and SE=8.   The formula of standard error is SE=zσn

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

A: When we don't have any prior information about population proportion, we generally take it as 0.50.…

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

A: From the provided information, Margin of error (E) = 0.05 Confidence level = 90% Assuming the sample…

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

A: Sol:- Given Margin of Error = E = 0.02 For 99% Confidence Interval  zα/2=2.576

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

A: Given Margin of error=0.05 At 95% CI=1.96

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

A:

Q: software system. In planning for the operating system that he will​ use, he needs to estimate the…

A: Given that  Margin of error =E =5%=0.05

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

A:

Q: A researcher gathered from historical papers that the proportion for the success of an event was…

A:

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

A:

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

A: Critical value: Here, α = 0.01. Using excel formula “=NORM.S.INV(1-(0.01/2))”, the critical value is…

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

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Use EXCEL…

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

A: (a) Given that , The confidence level is, C = 95% = 95/100= 0.95 The level of significance is, α =…

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

A:

Q: How many widgets need to be sampled in order to be 98% confident that the error in estimating the…

A: Givenconfidence level=98%Margin of error(E)=0.05

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

A: Given,Margin of error(E)=0.05α=1-0.90=0.1α2=0.05Z0.05=1.645

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

A: From the provided information, Margin of error (E) = 1% or 0.01 Confidence level = 90%

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

A: Suppose p is the true population proportion of air passengers who prefer aisle seats.

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

A:

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

A: Given data,E=3%=0.03Z-value at 90% confidence is Zc=1.645

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

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.