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What is the expected number of breakdowns in any given day? What is the variance and standard deviation for this distribution?
A hypothesis test produces a t statistic of t = 2.20. If the researcher is using a two-tailed test with a = .05, how large does the sample have to be in order to reject the null hypothesis
Is there an association between the use of computerized system and hospital mortality? In a large-scale hospital study, the study investigator randomly sampled 35 hospitals from all hospitals in Tex
Supplier on-time delivery performance is critical to enabling the buyer? organization to meet its customer service commitments. Therefore, monitoring supplier delivery times is critical.
Based on a sample of 64 students , Healthy Lifestyles Incorporated (HLI) wouild like to apply the central limit theorem to make various estimates.
Assume a normal distribution. Draw a well-labeled curve for each part. Round both to two decimal places.
Assume a normal distribution. Draw a well-labeled curve for each part.
Using the reported data, what is the estimate of the risk measure that was chosen? What is the study design that the investigators used?
Assume that three industrial processes (A, B and C) are independent. If the probability of successfully working for 8 hours is .99 for process A, .95 for process B, and .80 for process C, then:
What is the probability that exactly two of these three samples will contain four or more of these diatoms? Unsure, if you use poisson then use bionomial distribution.
A particular investment fund is comprised of more than 1000 companies world-wide that are considered to be socially responsible investments. The average return rate for the companies in this fund l
Suppose that f (x) = e-(x-7.4) for 7.4 < x and f (x) = 0 for x ? 7.4. Determine the following probabilities. Round your answers to three decimal pl
To verify this claim power four samples were taken by sampling average of four lots. The results were: 4.94, 5.09, 5.03 and 4.90 mg / cc. These results, presented sufficient evidence to indicate tha
A recent report by the American Medical Association stated the average annual salary of psychiatrists is $189,121 with a population standard deviation of $26,975.
An average computer mouse inspector can inspect 55 mice per hour with a population standard deviation of 14 mice per hour. The 44 computer mice inspectors at a particular factory can only inspect 50
Can you do it on the basis of the information already given? Can you do it if you are also told the average and the standard deviation of the numbers in the box, but are not told the numbers themsel
The acceptable level for insect filth in a certain food item is 3 insect fragments per 10 grams. A sample random of 60 ten gram portions of the food item is obtained and results in a sample mean of
Mac Inc., which was created in 1962, has yielded the following percentage returns on its stock for the last 5 years: 13.2, 5.0, 10.2, 7.5, and 12 .9.
An important measure of the performance of a locomotive is its "adhesion," which is the locomotive's pulling force as a multiple of its weight. The adhesion of one 4400-horsepower diesel locomotive
Determine the amount of axial contraction of the shaft when the propeller exerts a force on the shaft of 5 kN. The bearings at B and C are journal bearings.
When an entity has completed all the processing in the system, what should we do with it? Where should it be routed? Why?
Suppose referendum to increase funding for education is on the ballot in a large town (population over 100,000). An exit poll of 500 voters finds that 245 voted for the referendum. How likely are th
The proportion of Americans who are satisfied with the way things are going in there lives is 0.76. Suppose that a random sample of 110 Americans is obtained.
What is the probability a simple random sample of 50 ten gram portions of the food item results in a mean of at least 4.7 insect fragments? P(x > 4.7) = ? Round to 4 decimal.