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1) Find the viarance for the given data. Round your answer to one or more decimal place than the original data. 5.1,4.7,8.8,3.5,5.6
Find the standard deviation for the given sample data. Round your answer to one more decimal place than is present in the original data.
1) The manager of an electrical supply stored measured the diameters of the rolls of wire in the inventory. The diameters of the rolls (in meters) are listed below.
0.29 0.223 0.31 0.549 0.667 0.184 0.462
2) The numbers listed below represent the amount of precipotation ( in inches) last year in six different U.S. cities.16.7 12.0 39.1 48.7 14.1 21.6
An engine system consists of three main components in a series, all having the same reliability.
An aptitude test is designed to measure leadership abilities of the test subjects. Suppose that the scores on the test are normally distributed with a mean of 580 and a standard deviation of 120.
The production line that packages boxes of raisins at a snack food manufacturer will be conisdered operating properly if the average weight of the boxes of raisin is 3.5 ounces with a standard deviation of 0.3 ounces.
Plot fitted values against residuals. Does this plot point out any problems with homoscedasticity?
Of 900 consumers surveyed, 414 said they were very enthusiastic about a new home decor scheme. What is the 99% confidence interval for the population proportion?
Can you conclude that u1 is not equal to u2 at alpha=.05? State the hypothesis in orders of 1-2. construct a 99% confidence interval for the difference in true means. State the confidence interval in terms of 2-1.
Find out the Expected value of the perfect information for the given problem. Given the subsiquent cost tree, illustrate what is the expected outcome.
Write down the probability of that the median of the sample or average medians is greater or more than 320 minutes?
Assume that we will randomly select a sample of 64 measurements from a population having a mean equal to 20 and a standard deviation equal to 4.
A random sample of 100 students at Southern University was collected. The mean age was found to be 24.2 years, with a standard deviation of 3.4 years.
A researcher is interested in the relationship between caffeine consumption and activity level for elementary school children. A sample of 20 children is obtained and the children are separated into two roughly equivalent groups.
Describe a hypothesis upon which the manufacturer might wish to conduct a test concerning the relative effectiveness of the new fertilizer.
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