A researcher wants to do a study to see what the proportion of vaccinated people is in a certain area of New Jersey. How many people need to be polled to be with 2% of the actual population proportion with 95% confidence?

Q: Your professor wishes to estimate the proportion of high school students enrolled in college-level…

A: Given: margin of error of 3.5 percent 99% confidenp p= 18.3%

Q: A survey shows that 3/5 Australian adults are overweight and 1/10 Australian adults are obese. What…

A:

Q: estimate how many people you would need to survey in order to estimate the percentage in your…

A: here given , Suppose you want to estimate the percentage of employees who want to work from home.…

Q: A survey of shoppers is planned to see what percentage use credit cards. Prior surveys suggest 53%…

A: Find z-critical value:…

Q: A researcher wants to estimate the proportion of electric car owners in Los Angeles County. The…

A: According to the given information, we havePopulation proportion, p = 10% = 0.10Margin of error, E =…

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: According to the American Cancer Society, in 2016 10.7% of the U.S. working population commute to…

A: From the provided information, In 2016, 10.7% of the U.S. working population commute to work by…

Q: What is the test statistic? Round your answer to three decimal places. Click…

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Q: Why do you think any serious researcher would use the sample mean to estimate for the population…

A: Generally research is carried out to determine a particularoutcome in the targeted…

Q: You take a random sample of size 25 students and find the 5 who understand this lecture. With 99%…

A:

Q: Imagine that the pregnancy test accurately indicates pregnancy in 97.5% of the people who have it.…

A: The miss rate will be 2.5%

Q: A survey of American households found that 1/4 had a land line, 7/12 had cable, and 1/3 had neither.…

A: It is an important part of statistics. It is widely used.

Q: As part of their efforts, the executives also surveyed managers across the country to determine…

A: Testing a hypothesis pertaining to a population mean, a population proportion (a fraction, ratio, or…

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: If you have a 99% confidence that a population proportion is in the interval from a to b, what does…

A:

Q: Reach out to a family member, older friend, or another professor and ask them whether they feel that…

A: Larger samples tend to be more accurate than smaller samples if the samples are chosen randomly. The…

Q: A hospital administrator wants to estimate the proportion of patients whose hospital stay exceeds a…

A: Given Margin of error=0.06 P-cap=0.5

Q: researcher wishes to estimate the proportion of the adult population of the U.S. has sleep…

A: E=0.03 99% confidence interval for z=2.576 p=0.5

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

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Q: If you wanted information about a population, it could be impossible to ask everyone. One way to…

A: In any research or in a survey, a population of interest is considered. While it is not possible to…

Q: Say that there are five populations, and we need to test for difference of population means.  If we…

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Q: Emma wants to estimate the percentage of people who use public transportation in a city. She surveys…

A: Obtain the margin of error. The margin of error is obtained below: The formula for the margin of…

Q: A Plitical pollster wants to know what proportion of voters think james burger should go away and…

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Q: A vet wants to determine the proportion of household pets that have pet insurance. What size sample…

A: Given that  Margin of error=E=0.06 ,  90% confidence

Q: How large is the sample if the confidence level is 97%, Ɛ = 2.5%  and ρ = .35?

A:

Q: Experts claim that 10% of murders are committed by women.  In a random sample of 67 murders, 10 were…

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Q: A Polling agency wants to determine the percentage of waters in favour of extending tax cuts. they…

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Q: what range of raw scores makes up the middle 40%

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Q: You want to estimate the percentage of small incorporated businesses that are owned by women. A…

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Q: You would like to estimate the proportion of all residents in favor of a new law with 98%…

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A: Given that Margin of error, E = 0.03 Population proportion, p = 0.15 Level of confidence = 95%

Q: A researcher is running a study to determine the proportion of men that wear neckties to work. To…

A: Since, we answer only first three sub-parts of a question, we will answer the first three. Please re…

Q: According to an article in Newsweek, the natural ratio of girls to boys is 100:105. In China, the…

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Q: Suppose an internet marketing company wants to determine the percentage of customers who click on…

A: Margin of error=E=5%=0.05 , Confidence level=C.I=94%=0.94

Q: elevision sports commentator wants to estimate the proportion of Americans who follow professional…

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Q: A car dealership is deciding the proportion of cars they will order with cloth seats. You have been…

A: We have to find sample size required for given margin of error.

Q: A researcher wanted to estimate the proportion of undergraduate college students (18– 29 years) with…

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Q: Suppose you want to test the claim that a population mean equals 38.  State the null hypothesis.

A: Given that, Claim: population mean equals 38.

Q: eights were measured from 35 college students in September and April of th ar.What statistical test…

A: Weights is the continuous quantity and if the population follow normal distribution then the two…

Q: Suppose an internet marketing company wants to determine the current percentage of customers who…

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Q: According to an article in Newsweek, the natural ratio of girls to boys is 100:105 . In China, the…

A: Given that, According to an article in Newsweek, the natural ratio of girls to boys is  100:105 . In…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.