77.8 71.3 55.6 43.0 38.5 34.6 28.5 25.7 24.5 23.1 22.4 22.2 21.5 21.1 20.2 18.2 17.5 16.0 15.8 15.5 15.1 15.0 14.7 14.2 14.1 13.7 13.5 13.1 12.0 11.8 11.6 11.1 11.1 10.9 10.3 10.2 9.9 7.9 7.7 6.5 6.2 4.6 4.5 4.5 3.6 3.2 1.9 1.8 1.4 0.8 this is data speeds from […]
Researchers for a manufacturer of barometers (devices to measure atmospheric pressure) read each of 50 barometers at the same time each day. The mean of the readins is 30.2 with a standard deviation of 0.24 and the readings appear to be normally distributed. A. What percentage of the barometers read over 30.8? B. What percentage […]
assume that population means are to be estimated from the sample described. Use the sample results to approximate the margin of error and the 95 % confidence interval. Sample size= 196 sample mean= 77 sample standard deviation=15 Margin of error=? 95 % confidence interval? Looking for a Similar Assignment? Order now and Get 10% […]
Each car in a sample of seven cars was tested for nitrogen-oxide emissions (in grams per mile), and the following results were obtained. 0.08, 0.11,0.15, 0.13, 0.12, 0.05, 0.13. Assuming that this sample is representative of cars in use, construct a 95% confidence interval estimate of the mean amount of nitrogen-oxide emissions for all cars. […]
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