99% confidence interval of a population proportion is (0.78,0.86) Calculate the sample proportion? Round to two decimal places
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99% confidence interval of a population proportion is (0.78,0.86)
Calculate the sample proportion?
Round to two decimal places
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- SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested in estimating the average SAT score of first year students at your college. If you would like to limit the margin of error of your 95% confidence interval to 25 points, how many students should you sample? > Next Question & *- 3. 6. 5 12 %23Use the Student's t distribution to find tc for a 0.95 confidence level when the sample is 3. (Round your answer to three decimal places.) USE SALTCI on Mean, Variance Known Students on an internship program in the US Fish and Wildlife Service wishes to test the nitrogen content on rivers and waterways in the US Midwest states. 36 sample measurements were taken in various rivers and wate found to be in 2.6 grams per milliliter. Find the 95% and 99% confidence intervals for the mean mercury content. Population standard deviation is 0.3 gram per milliliter. If the students want the error to be less than 0.05, how large a sample size would be required at 95% confidence? Would the required sample size increase if a higher degree of confidence is set? O a. 95% CI: 2.5095% confidence interval of a population proportion is (0.76,0.89) What is the margin of error? Round to two decimals(b) Compute the P-value of the test statistic. Round the answer to at least four decimal places. P-value =Change in the average birth weight of babies born in the U.S. since 1990, in ounces 0 -0.5- -1.0 -1.5 1990 '95 ¹00 "Born between 37 and 41 and net including multiple births Source: Obstetrics and Gynecology prvy. 105 A local hospital wanted to see if the claim was true and randomly sampled 19 baby's weights and found an average weight of 7 pounds. Test the claim using a 10% level of significance that the mean weight significantly smaller than the national average of 7.5 pounds. Use the population standard deviation of 1.25 pounds. Give answer to at least 4 decimal places. What are the correct hypotheses? (Select the correct symbols.) pounds Ho: Select an answer♥ ?✔ H₁: Select an answer? Based on the hypotheses, find the following: Test Statistic = p-value = pounds The correct decision is to [Select an answer The correct summary would be: [Select an answer weight significantly smaller than the national average of 7.5 pounds. What is the type I error in this situation? Select an answer…95% confidence interval of a population proportion is (0.72,0.93) What is the margin of error (round answer to 2 decimals)Library From a sample of 23 graduate students, the mean number of months of work experience prior to entering an MBA program was 34.24. The national standard deviation is known to be 18 months. What is a 99% confidence interval for the population mean? Accessib A 99% confidence interval for the population mean is (Use ascending order. Round to two decimal places as needed.) Purchas Commu Enter your answer in the edit fields and then click Check Answer. All parts showing Clear All Check Answer ns Type here to search acer F6 F8 RA researcher wants to estimate the mean blood cholesterol level of young men ages 15-25 with a 90.16% confidence interval. The blood cholesterol level of young men follows a Normal distribution with standard deviation σ = 15 mg/dl. How large a sample would the researcher need to take to estimate the mean blood cholesterol to within 7 mg/dl? A sample of at least______peoplePls helpPlease solve for margin of error and sample proportionUse the normal distribution to find a confidence interval for a difference in proportions p₁ Assume the results come from random samples. A 90% confidence interval for p₁ - p₂ given that p = 0.75 with n = 440 and p₂ = 0.65 with #₂ = 360 Give the best estimate for p₁ - p₂, the margin of error, and the confidence interval. Round your answer for the best estimate to two decimal places and round your answers for the margin of error and the confidence interval to three decimal places. Best estimate: i Margin of error: i Confidence interval: - P₂ given the relevant sample results. to
