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Suppose that a recent poll found that 40?% of adults in a certain country believe that the overall state of moral values is poor. If a survey of a random sample of 45 adults in this country is conducted in which they are asked to disclose their feelings on the overall state of moral? values, complete parts? (a) through? (e) below. Use the Tech Help button for further assistance.
(a) Find and interpret the probability that exactly 15 of those surveyed feel the state of morals is poor. The probability that exactly 15 of those surveyed feel the state of morals is poor is What? (Round to four decimal places as needed.)
a random sample of thirty-six 200 meter swims has a mean time of 3.02 minutes and a standard deviation of 0.08 minutes.
Find the probabilities that in 1 hour (a) there are between 23 and 26 calls inclusive, (b) more than 30 calls, using the normal approximation to the poisson distribution.
Determination of statistical significance can only be determined by calculating the exact p value and declaring results as significant. True or false?
suppose that two random variables x and y have a joint density function given by fxy and by checking we find that fxy
Write down the difference between reliability and validity? Write down the different kind of reliability and validity. What kind of reliability and validity would you seek in assessing employee performance?
The dimension is supposed to be 224 mm and the variability of the manufacturing process is unknown. Is there evidence that the mean dimension is not 224 mm?
Nancy believes that the average running time of movies is equal to 140 minutes. A sample of 4 movies was taken and the following running times were obtained. Assume the population of the running times is normally distributed.
The thickness of a flange on an aircraft component is uniformly distributed between 0.95 and 1.05 millimeters. Determine the cumulative distribution function of flange thickness.
Why is such information important to the business?
in a study entitled how undergraduate students use credit cards it was reported that undergraduate students have a mean
a sample of size 21 is taken and a significance test for h0 u 0 versus ha u doesnt equal 0 is run. the test
if in an observational study the statistical analysis has shown convincing evidence that the mean levels differed in
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