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4. How large a sample would be necessary to estimate the true proportion of defectives in...
a. Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval for a sample of size 198 with 42 successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. 95% C.I. = b. A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 0.5% margin of error at a 99% confidence...
QUESTION PART A: You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 90% confident that you esimate is within 0.5% of the true population proportion. How large of a sample size is required? n = Do not round mid-calculation. However, use a critical value accurate to three decimal places. QUESTION PART B: You want to obtain a sample to...
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p=0.69. You would like to be 95% confident that your esimate is within 2% of the true population proportion. How large of a sample size is required? Hint: Video [+]
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?
The West Virginia Radio Stations 92.9 FM desires to estimate the proportion of the market they hold with a maximum error of 0.1 and confidence interval of 0.95. How large sample would be required to estimate the fraction of listeners to within the desired level of accuracy? Since we don't know the true population portion, we assume the previous point estimate of 0.117 is the true proportion. Hint: p = 0.117; z_(a/2) = 1.96 for 95% confidence and error =...
How large a sample must be taken to estimate the proportion of households that visit a theme park with 95% confidence to within three percentage points? Show work,pls
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 95% confident that you esimate is within 4% of the true population proportion. How large of a sample size is required? n=? Do not round mid-calculation. However, use a critical value accurate to three decimal places.
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p*=19%p*=19%. You would like to be 98% confident that you estimate is within 4% of the true population proportion. How large of a sample size is required? n =
Suppose the U.S. president wants an estimate of the proportion of the population who support his current policy toward revisions in the health care system. The president wants the estimate to be within 0.02 of the true proportion. Assume a 95% level of confidence. The president's political advisors estimated the proportion supporting the current policy to be 0.43. (Use z Distribution Table.) a. How large of a sample is required? (Round the z-values to 2 decimal places. Round up your...
Step by step please A researcher wishes to estimate with 95% confidence the proportion of people that own home computers. No previous study was available for a proportion estimate. The researcher wants to be accurate within 2% of the true proportion. How large of a sample is necessary? *hint: when no proportion estimate is available, we use p-hat = .50