A television sports commentator wants to estimate the proportion of citizens who​ "follow professional​ football." Complete parts​ (a) through​ (c).     ​(a) What sample size should be obtained if he wants to be within 4 percentage points with 95​% confidence if he uses an estimate of 52​% obtained from a​ poll?   The sample size is

Q: 4a. He seems flustered and asks, "That's higher than I thought! Since you didn't ask everyone in the…

A: The objective of the question is to explain how a sample can be representative of a larger…

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 that  Margin of error = E = 4.5% = 0.045 90% confident  Level of significance = 10% = 0.10

Q: In 1941, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: We have given that For the survey taken in 1941 n1 = 1100x1 = 374p̂ = x1/n1 = 151/429 = 0.3520 And…

Q: Bopulation proportion of 1943 adults who were total abstainers and p, represent the population…

A: Solution: Given N1=1100,  X1=429 N2=1100,  X2=374 (α)= 0.05

Q: You are running a political campaign and wish to estimate, with 95% confidence, the proportion of…

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

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

A: Assume, p^ be the estimated proportion of computers with new operating system. n be the minimum…

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: 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 =0.025 Population proportion p=38%=0.38

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

A:

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: From the given information, the margin of error (E) is 0.12 and the confidence level is 0.98.

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: a. From the given information, confidence level is 0.96, p=0.48 and E=0.03.

Q: A survey asked, "Which leg do you put into your trousers first?" Of the 2,710 Americans surveyed,…

A:

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

A: It is given that margin of error (E) is 0.015 and the confidence level is 0.90.

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

A:

Q: In 1942 ​, an organization surveyed 1100   adults and​ asked, "Are you a total abstainer​ from, or…

A: The proportion of considered subjects, on which we are interested from a sample can be termed as…

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:

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

A: a)

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

A: Solution

Q: b. Which group is more likely to have taken a vacation in the last year: college graduates or…

A: Given data:   Yes No Total College Graduate 183 67 250 Not a College Graduate 126 124 250…

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

A:

Q: In 1945, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: Let, X1= number of abstainer in the previous test n1= total sample size of the past test p1^ =…

Q: A researcher wants to determine what proportion of all high school students plans to attend…

A: Obtain the critical value at 90% confidence level:It is given that the margin of error is 0.02. The…

Q: In 1944​, an organization surveyed 1100 adults and​ asked, "Are you a total abstainer​ from, or do…

A: We habe to find given proportion.

Q: Food services sent a survey to student, faculty, and staff in order to understand the lunch…

A: Given that, Food services sent a survey to student, faculty, and staff in order to understand the…

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Given Data: Margin of Error=0.22 p=0.54   z-value=1.96

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…

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.