Technology Results Pooled proportion: 0.40 Test statistic, z: 13.2930 Critical z: 1.2816 P-value: 0.0000 80% Confidence interval: 0.5240667
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- Estimated Speed Smashed into hit n = 16 n = 16 M = 40 M = 34 SS = 510 SS = 414 Use a one-tailed test with α = .01. Use the data to make a 99% confidence interval estimate of the mean difference in estimate speed between the “smashed into” group and the “hit” group The lower limit of the confidence interval isBabies: According to a recent report, a sample of 300 one-year-old baby boys in the United States had a mean weight of 25.5 pounds. Assume the population standard deviation is o =5.2 pounds. Answer the multiple choice question.Two hundred fish caught in Cayuga Lake had a mean length of 13.4 inches. The population standard deviation is 3.2 inches. (Give your answer correct to two decimal places.) (a) Find the 90% confidence interval for the population mean length. Lower Limit Upper Limit (b) Find the 98% confidence interval for the population mean length. Lower Limit Upper Limit
- 17Q16 Use t distribution table and normal standard distribution tableEstimated Speed Smashed into hit n = 16 n = 16 M = 40 M = 34 SS = 510 SS = 414 Use a one-tailed test with α = .01. Use the data to make a 99% confidence interval estimate of the mean difference in estimate speed between the “smashed into” group and the “hit” group The upper limit of the confidence interval is
- Mean Margin of Error confidence intervalYou want to estimate the mean weight of quarters in circulation. A sample of 50 quarters has a mean weight of 5.632 grams and a standard deviation of 0.056 gram. Use a single value to estimate the mean weight of all quarters. Also, find the 95% confidence interval for the average weight of all quarters. Find the 95% confidence interval for the mean weight of all quarters. ___ grams < < ___ grams (Round to three decimal places as needed.)Question attached
- deboo Find the critical value za/2 that corresponds to the confidence level 92%. Za/2= (Round to two decimal places as needed.)What is the z* critical value for constructing a 94% confidence interval for a proportion? Find the z-table here. 1.55 1.65 1.88 1.96monitor the percentage fat in hot dogs produced at a food processing plant a quality control technician randomly selects 15 hot dogs and measures the percentage fat of each. The sample data yield mean (xbar) 24.1 percent and standard deviation 0.9 percent. On the assumption that the fat content has a normal distribution a 95% confidence interval for the true mean percentage fat for all hot dogs currently being produced is about.