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A psychologist wants to determine if there is a linear relationship between the number of hours a person goes without sleep and the number of mistakes he/she makes on a simple teat. The following data is recorded. Determine the regression line equation.
Hours without Sleep x 32 38 48 24 46 35 30 34 42
Number of Mistakes y 6 8 13 5 7 6 5 8 12
Testing equality of two means - difference in performance of the two gasolines and difference in gasoline mileage output
Independent random samples of 12 users of the other system rate their system on the same scale. Based on these data, are the two telecommunication system equally liked? Explain.
A simple random sample of 36 bulbs yields a mean lifetime of 504 hours. Construct and interpret a 99% confidence interval for the mean lifetime of all such bulbs.
Line up for a family photo, with the condition that the youngest child is in the centre, how many distinguishable arrangements are there?
A random sample of 25 households finds that an average of 2.3 people reside in each house (the standard deviation is 0.35). With a 95% confidence level, what is your estimation of the population average?
let y be a random number with probability density function gy0.5siny where pigeyge0. generate 1000 ys. if nk represents
Does a regression model imply causation? Why or why not? Provide an example which provides and independent and dependent variable from your place of work.
What is the probability that a randomly selected grapefruit will have a diameter of at least 4.14 inches?
Test the manager's claim at 5% and 1% significance level tests.
If the company's report is correct, what is the probability that the average balance of an account in the sample is $394 or less?
suppose that in the setting of the previous exercise you are willing to settle for a margin of error of $1000. will the required sample size be larger or smaller?
Let the following all-integer linear program: Max 1x1 + 1x2, s.t. 4x1 + 6x2
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