A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 0.2% margin of error at a 99.5% confidence level, what size of sample is needed?

Q: Students at a certain college were asked if they have a car. After surveying 823 students, it was…

A: We know that a margin of error tells us how many percentage points our results will differ from the…

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the​…

A: Step 1: Step 2: Step 3: Step 4:

Q: The newspaper conducted a survey and asked some of the city's voters which candidate they preferred…

A: For the given confidence interval, the margin of error, E is:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: As there is no estimates available, the sample proportion to be 0.50, i.e., 50%.The margin of error…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given  e=Margin of error=8%, level of significance ɑ=0.10

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: A pollster wanted to predict the upcoming results of the 2020 presidential elections in a local…

A:

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 political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Assume p-cap as 0.5 because no preliminary estimate is available.

Q: political candidate has asked you to conduct a poll to determine what percentage of people support…

A: We have given that  Margin of error =E=8%=0.08

Q: A researcher wants to do a study to see what the proportion of vaccinated people is in a certain…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Let P be the population proportion (might be a hypothesized value), p be the sample proportion and α…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

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

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: A research institute poor ass respondents if they felt vulnerable to identity theft. In the pool, N…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Given that, Margin of error = 3% = 0.03 99% confidence level

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Population consist all the set of all objects and sample is a subset of population. In real life…

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.