Noise levels at 66 manufacturing plants were measured in decibels yielding the following data:
147,144,146,127,154,140147,144,146,127,154,140
Construct the 80%80% confidence interval for the mean noise level at such locations. Assume the population is approximately normal.
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Step 4 of 4:
Construct the 80%80% confidence interval. Round your answer to one decimal place.
Noise levels at 66 manufacturing plants were measured in decibels yielding the following data: 147,144,146,127,154,140147,144,146,127,154,140 Construct...
Noise levels at 3 manufacturing plants were measured in decibels yielding the following data: 168,157,160. Construct the 80 % confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Copy Data Step 4 of 4 : Construct the 80 % confidence interval. Round your answer to one decimal place.
Noise levels at 66 manufacturing plants were measured in decibels yielding the following data: 132,148,139,105,126,118 Construct the 95%confidence interval for the mean noise level at such locations. Assume the population is approximately normal. 1.Calculate the sample mean for the given sample data. Round your answer to one decimal place. 2.Calculate the sample standard deviation for the given sample data. Round your answer to one decimal place. 3.Find the critical value that should be used in constructing the confidence interval. Round...
Noise levels at 5 airports were measured in decibels yielding the following data: 146,162,170,152,187 Construct the 80% confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Step 1 of 4 : Calculate the sample mean for the given sample data. Round your answer to one decimal place.
Noise levels at 3 volcanoes were measured in decibels yielding the following data: 142,113,135 Construct the 90% confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Step 1 of 4: Calculate the sample mean for the given sample data. Round your answer to one decimal place.
Noise levels at 3 concerts were measured in decibels yielding the following data: 124,134,134 Construct the 98% confidence interval for the mean noise level at such locations. Assume the population is approximately normal.
The following measurements (in picocuries per liter) were recorded by a set of ozone detectors installed in a laboratory facility: 715, 685.9, 706.1, Using these measurements, construct a 80% confidence interval for the mean level of ozone present in the facility. Assume the population is approximately normal. Copy Data Step 1 of 4 : Calculate the sample mean for the given sample data. Round your answer to two decimal places.
The following data give noise levels measured at 25 different times directly outside of Grand Central Station in Manhattan. 82, 89, 94, 110, 74, 122, 112, 95, 100, 78, 65, 60, 90, 83, 87, 75, 114, 85, 69, 94, 124, 115, 107, 88, 97 Use this data to test the null hypothesis that the average noise level directly outside of Grand Central Station is less than or equal to 80 decibels. Hint: compute the p-value and make a reasonable decision...
A manufacturer of small engines concerned with the issue of noise pollution developed a new engine that would be quieter than the standard model. 15 of the new models were tested for noise level and with 25 of the standard models. The results are given below with noise measured in decibels. Sample Sample Size Sample Mean Sample Variance Standard 25 84 169 New 15 72 100 a. Find a 98% confidence interval for the difference in mean decibel levels μse...
The following measurements (in picocuries per liter) were recorded by a set of radon gas detectors installed in a laboratory facility: 382, 361.2, 333, 348.3, 385.1, 332.2, 380.7 Using these measurements, construct a 95 % confidence interval for the mean level of radon gas present in the facility. Assume the population is approximately normal. Copy Data Step 3 of 4: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places...
Refer to the accompanying data set and construct a 90% confidence interval estimate of the mean pulse rate of adult females then do the same for adult males Compare the results Click the icon to view the pulse rates for adult females and adult males Construct a 90% confidence interval of the mean pulse rate for adult females Pulse Rates - X bpm bpm (Round to one decimal place as needed) Males 85 69 75 65 51 74 57 73...