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According to a certain? survey, adults spend 2.35 hours per day watching television on a weekday. Assume that the standard deviation for? "time spent watching television on a? weekday" is 1.93 hours.
?Determine the probability that a random sample of 40 adults results in a mean time watching television on a weekday of between 2 and 3 hours.
a survey found that womens heights are normally distributed with mean 63.5 in. and standard deviation of 2.5 in. a
What is (1 – ß), the probability of rejecting the null hypothesis of part a, when in fact the true yield of the process is 0.925?
car sales in the current month 18830 toyota camry cars were sold and there were 18341 honda civic cars soldprovide two
Find and graph the sample regression line of y on x and the given data as points on the same axes. Show the details of your work.
A bulb is selected at random from the storage room and tested.Find the probability that the bulb was produced by machine C given that it was still operating after 16 days.
Test for the existence of a nonzero linear correlation in the "population" of prices of the two stocks. For your sample, use as many daily prices as you can.
a) How is it possible that the minimum of the 365 values is 0 inches and the median is also 0 inches? b) Describe the distribution as symmetric, left-skewed or right-skewed.
Describe why ordinary least squares solution is not unique. What can you say about residuals of any solution? Is ridge regression solution unique? Explain why or why not?
is it possible to calculate distribution-free confidence intervals based upon the wilcoxon two-sample test? if so what
A test for a disease that affects 0.1% of the population is 99% effective on people with the disease (that is, it says they have it with probability 0.99).
The population of IQ scores forms a normal distribution with mean of μ = 100 and a standard deviation of σ = 15. What is the probability of obtaining a sample mean greater than M = 105,
a company that produces an expensive stereo component is considering offering a warranty on the component. suppose the
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