Suppose you survey a random sample from a large population to understand the population proportion. How large must your sample be if you want the Margin of Error to be 6% = 0.06 with a confidence level of 98%? (Be sure to show your calculations.) %3D

Use the confidence interval to find the margin of error and the sample mean. (0.264,0.420) The margin of error is.

Please solve using EXCEL and show each step/formula used to solve the question. Person A studies a random variable H that has a normal distribution with mean -1.8 and found that Prob(H ≤ -1.2) = 0.64. However, Mary does not remember the variance of H. Find the value of the variance for Person A.

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drawn to scale. 50% of the data has values below 12 and 50% have values above 12. the 25th percentile is 10. can we find the interquartile range, if so what is it?

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 95% confident that you estimate is within 1.5% of the true population proportion. How large of a sample size is required?

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 80% confident that you estimate is within 2.5% of the true population proportion. How large of a sample size is required?

Write all steps

Use the data and the correct formula to find the margin of error for estimating a population proportion. • n = 100, x = 45, 95% level of confidence %3D Edit View Insert Format Tools Table

We are collecting data on the patients that have been vaccinated for the coronavirus, and the initial data shows a 90% success. We want the margin of error to be no more than 3%. We want to be extremely  careful, so we are going to use a 99% confidence. Determine the smallest size of the sample to achieve this level of confidence.  a 560  b 680  c 664  d 600  e 686