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Corn: In a prior sample...

Corn: In a prior sample of corn, farmer Carl finds that 12% of the sample has worms but the margin of error for his population estimate was too large. He wants an estimate that is in error by no more than 2.5 percentage points at the 95% confidence level. Enter your answers as whole numbers.

(a) What is the minimum sample size required to obtain this type of accuracy? Use his prior sample proportion in your calculation.

The minimum sample size is

ears of corn.(b) What is the minimum sample size required to obtain this type of accuracy when you assume no prior knowledge of the sample proportion?

The minimum sample size is

ears of corn.Pinworm: In a random sample of 830 adults in the U.S.A., it was found that 78 of those had a pinworm infestation. You want to find the 99% confidence interval for the proportion of all U.S. adults with pinworm.

(a) What is the point estimate for the proportion of all U.S. adults with pinworm? Round your answer to 3 decimal places.(b) Construct the 99% confidence interval for the proportion of all U.S. adults with pinworm. Round your answers to 3 decimal places.

< p <(c) Based on your answer to part (b), are you 99% confident that more than 5% of all U.S. adults have pinworm?

Yes, because 0.05 is below the lower limit of the confidence interval.

No, because 0.05 is above the lower limit of the confidence interval.

No, because 0.05 is below the lower limit of the confidence interval.

Yes, because 0.05 is above the lower limit of the confidence interval.(d) In Sludge County, the proportion of adults with pinworm is found to be 0.15. Based on your answer to (b), does Sludge County's pinworm infestation rate appear to be above the national average?

Yes, because 0.15 is below the upper limit of the confidence interval.

No, because 0.15 is below the upper limit of the confidence interval.

No, because 0.15 is above the upper limit of the confidence interval.

Yes, because 0.15 is above the upper limit of the confidence interval.

(a) What is the minimum sample size required to obtain this type of accuracy? Use his prior sample proportion in your calculation.

The minimum sample size is

ears of corn.(b) What is the minimum sample size required to obtain this type of accuracy when you assume no prior knowledge of the sample proportion?

The minimum sample size is

ears of corn.Pinworm: In a random sample of 830 adults in the U.S.A., it was found that 78 of those had a pinworm infestation. You want to find the 99% confidence interval for the proportion of all U.S. adults with pinworm.

(a) What is the point estimate for the proportion of all U.S. adults with pinworm? Round your answer to 3 decimal places.(b) Construct the 99% confidence interval for the proportion of all U.S. adults with pinworm. Round your answers to 3 decimal places.

< p <(c) Based on your answer to part (b), are you 99% confident that more than 5% of all U.S. adults have pinworm?

Yes, because 0.05 is below the lower limit of the confidence interval.

No, because 0.05 is above the lower limit of the confidence interval.

No, because 0.05 is below the lower limit of the confidence interval.

Yes, because 0.05 is above the lower limit of the confidence interval.(d) In Sludge County, the proportion of adults with pinworm is found to be 0.15. Based on your answer to (b), does Sludge County's pinworm infestation rate appear to be above the national average?

Yes, because 0.15 is below the upper limit of the confidence interval.

No, because 0.15 is below the upper limit of the confidence interval.

No, because 0.15 is above the upper limit of the confidence interval.

Yes, because 0.15 is above the upper limit of the confidence interval.

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