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The length of country and western songs is normally distributed and has a mean of of 170 seconds with a standard deviation of 49 seconds. find the probabality that a random collection of 16 songs will have a mean of 158.30 seconds or less?
find probabilty that the average of those counts is more than 83.0 mosquitoes per square meter. Assume the variable is normally distributed.
We have no idea Regarding the shape of the population distribution. What is the probability that the mean fee for a sample of 30 customers was less than $125?
What are the expected value and variance of the following probability distribution?
A standard deviation of .15 million people. What is the proportion of these newscasts having between .9 million and 1.5 million viewers?
let X have one of the following distributions: if the prior probabilities are P(H0)= P(HA) which outcomes favor H0? What prior probabilities correspond to the decision rules with a= 0.2 and a =0.5
The researcher found that Abraham Lincoln's educational score did not correlate highly with the expected variable. What is wrong?
A customer receives a defective product. What is the probability that it came from Binford? What assumptions did you make to answer this question?
Auto pistons at Yongpin Zhou's plant in Shanghai are produced in a forging process, and the diameter is a critical factor that must be controlled. Construct the 3-sigma x-chart and the 3-sigma R-shart for this dimension, using the data observed in ..
Determine a 95 % confidence interval for the iron concentration.
However one of the children fails to solve the peoblems, so the researcher has an undetermined score. what is the best measure of central tendency for these data?
The Globe Fishery packs shrimp that weigh more than 1.91 ounces each in packages marked" large" and shrimp that weigh less than 0.47 ounces each into packages marked "small"; the remainder are packed in "medium" size packages.
A linear regression equation is computed for a sample of n = 18 pairs of X and Y scores. For the analysis of regression testing the significance of the equation, what are the df values for the F-ratio?
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