uppose that the insurance companies randomly surveyed 400 drivers and found that 320 claimed they always buckle up. We are interested in the population proportion of drivers who claim they always buckle up.  Use this scenario for the next 4 questions.   What is the meaning of p ^ in the context of this scenario? Group of answer choices the proportion of drivers who claim they always buckle up in the POPULATION Neither of these the proportion of drivers who claim they always buckle up in the SAMPLE   What is the value of p ^ in the context of this scenario? f you wanted to estimate the true percentage of drivers who claim they always buckle up to within 1% error with 95% confidence, how many drivers would you need to survey?  You may use the pilot study as a preliminary estimate of p ^.

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A:

Q: Suppose you could take all possible samples of size n = 25 from a Normal population with mean μ = 50…

A: Given that a sample of size n = 25 is drawn from a normal population with mean μ = 50 and σ = 5.

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

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Q: a. Does this sample provide enough evidence to suggest that the number of résumés that were received…

A: Given : n=20 , μ0=250 , α=0.05 From the given sample data : The sample mean is , X¯=∑Xn=225.8 The…

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Q: % of students entering four-year colleges receive a degree within six years. Is this percent smaller…

A: We have given that  Sample size n = 277 Favorable cases x = 141 Sample proportion p^=x/n

Q: In the previous study done by a student, it was found out that 28.5% of the students used twitter.…

A: Solution: From the given information, p=28.5%=0.285, Confidence level is 0.95 and E=0.035.

Q: .The percent of free throws made by an NBA team last year was 68%. The coach wants to know if that…

A:

Q: To determine the percentage of patients who follow the advice of their personal physician,…

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Q: A survey was conducted to determine the percentage of college freshmen that planned to take a math…

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Q: The Office of Financial Aid at the University of Michigan currently quotes the cost of textbooks for…

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Q: We want to find out if college students trust a presidential candidate (in this case Mitt Romney).…

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Q: The National Academy of Science reported that 33 % of research in mathematics is published by US…

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Q: A soap manufacturer wanted to know that percentage of the citizens of Sri Lanka use his product. He…

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Q: Is veganism more common than it used to be? In 2012, it was reported that 2% of Americans were…

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Q: A researcher wants to estimate the percentage of adults in Georgia that have not graduated from high…

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Q: Miller Junior High is considering changing its school colors.  The results of a survey that 16 out…

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Q: A national polling organization wishes to estimate the percentage of all teenagers who believes…

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Q: Imagine a researcher asks a sample of five people to drive two types of cars and rate each of them…

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Q: rofessor Jennings claims that only 35% of the students at Flora College work while attending school.…

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Q: Imagine a database from the Gallogly College of Engineering that contained the starting salaries for…

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Q: n you randomly assign 25 of them to play a violent video game and the other 25 of them to play a…

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Q: ou are a medical researcher that wants to determine if your new drug can lower people's blood…

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Q: PART C. Records in the country show that six out of 10 convicted offenders were reconvicted 10 years…

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Q: An antidepressant has historically been known to relieve depression for 80% of patients who use the…

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Q: A researcher wishes to estimate the number of households with two computers. How large a sample is…

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Q: A researcher wants to study the relationship between salary and gender. She randomly selects 220…

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Q: 2. A poll was taken this year asking college students if they considered themselves overweight. A…

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Q: If the percentage of defective in a factory was 0.30, a random sample of 200 units was taken, and 50…

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Q: The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random.…

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Q: 2. Among the 50 Geography students, 44 students passed the course of Univariate Statistics in…

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Q: Turkey has a great literary tradition that spans centuries. One might assume, then, that the Turkish…

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Q: A random sample of 60 students in the business statistics course answered a survey on the average…

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Q: If a manufacturer conducted a survey among randomly selected target market households and wanted to…

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Q: A farmer wants to know whether or not the sizes of Christmas trees differ between two separate…

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Q: Newborn babies are more likely to be boys than girls. A random sample found 13,173 boys were born…

A: We have to use CLT for finding the probability for proportions.

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.