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a) Let X have t-distribution with 29 degrees of freedom. What is the distribution of X^2?
b) Let X and Y be normal.What is the distribution of (X + Y )^2 / (X-Y)^2?
The task will take between 8 minutes & 11 minutes. Find this probability. The engineer would also like to know what the time is such that 40% of the task times are less than this value.
Seiko purchases watch stems for their watches in lots of 10,000. Seiko's sampling plan calls for checking 20 stems, and if 3 or fewer stems are defective, the lot is accepted.
Construct the 95% confidence interval estimate of the mean number of migraine attacks for those treated with acupuncture.
telephone calls arrive at the information desk of a large computer software company at a rate of 15 per hour.a what is
Among 9 electrical components exactly one is known not to function properly. If 3 components are randomly selected, find the probability that all selected components function properly.
the distribution of a population of mechanical aptitude test is normal with a mean of 46 and a standard deviation of 4.
The population of incomes in a particular community is thought to be highly right-skewed with a mean equal to $36,789 and a standard deviation equal to $2,490.
Conduct a one-tailed hypothesis test given the information below. A certain brand of Green Energy light bulbs was advertised as having an average illumination life-span of 2,500 hours.
If you are using the method of least squares for fitting trends in an annual time series containing 25 consecutive yearly values,
1.an inspector inspects large truckloads of potatoes to determine the proportion p with major defects prior to using
What decision should be made regarding the null hypothesis?
Approximately what percentage of the manufacturer's batteries will last between 40 months and 80 months? suppose your battery lasts 37 months. What could you infer about the manufacturer's claim?
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