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Please Solve correctly. For a sample of N=41 measurement, the average and standard deviation are 50...
A population has a mean of 200 and a standard deviation of 50. A sample of size 100 will be taken and the sample mean will be used to estimate the a. What is the expected value of x? b. What is the standard deviation of x? c. 18. population mean Show the sampling distribution of x What does the sampling distribution of i show?
A simple random sample with n = 50 provided a sample mean of 23.5 and a sample standard deviation of 4.2. a. Develop a 90% confidence interval for the population mean (to 1 decimal). b. Develop a 95% confidence interval for the population mean (to 1 decimal). c. Develop a 99% confidence interval for the population mean (to 1 decimal). d. What happens to the margin of error and the confidence interval as the confidence level is increased?
30. The average measurement on a control chart is x = 3.514, and the standard deviation of the measurements is s - .009 a. Find the percentage of measurements that are larger than 3.525 b. Find the percentage of measurements that are less than 3.500. c. What percentage of the measurements are between 3.510 and 3.520?
50. Here are 4 measurements: 51.3, 55.6, 49.9 and 52.0. Calculate the average, standard deviation, and relative standard deviation. (Show all work: No work- No points!!!) Mean is Standard deviation is? Relative Standard Deviation is?
n=25 sample average= 96 sample standard deviation = 1.5. What is the lower bound of a 2-sided 95% confidence interval on the population standard deviation?
Please explain and write clearly. A sample of 20 items provides a sample standard deviation of 5. a. Compute the 90% confidence interval estimate of the population variance. b. Compute the 95% confidence interval estimate of the population variance.c. Compute the 95% confidence interval estimate of the population variance.
51 measured data points have a sample mean of 56.04 and a standard deviation of 3.4. Estimate the range of values for which you would expect 95% of all future measurements to fall (or for a single future measurement to fall within 95% probability). Find a, where the data is expected to fall ±a about the sample mean
A random sample of n = 50 observations from a quantitative population produced a mean x = 2.6 and a standard deviation s = 0.35. Your research objective is to show that the population mean y exceeds 2.5. Calculate β = P(accept H0 when μ = 2.6). (Use a 5% significance level. Round your answer to four decimal places.)
A simple random sample of 30 items resulted in a sample mean of 50. The population standard deviation is σ = 10. a. Compute the 95% confidence interval for the population mean. Round your answers to one decimal place. Enter your answer using parentheses and a comma, in the form (n1,n2). Do not use commas in your numerical answer (i.e. use 1200 instead of 1,200, etc.) b. Assume that the same sample mean was obtained from a sample of 90...
In class we had 41 95% confidence intervals that we believe to be calculated correctly. The confidence intervals were collected by taking a sample of 60 data points from the population data. 41 of the confidence intervals appear to be calculated correctly. Of these 4 of them do not have the population mean inside the confidence interval. Based on a 95% confidence, we expected 2 to not contain the population mean. Did this happen by chance alone? To find your...