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The manager of the plant supply store wishes to find out whether mean amount of paint contained in 1 gallon cans bought from a nationally known manufacturer is actually 1 gallon. You know from manufacturer's specifications that standard deviation of amount of paint is 0.02 gallon. You choose random sample of 50 cans, and mean amount of paint per 1-gallon can is 0.995 gallon.
A) Is there evidence that mean amount is different from 1.0 gallon (use α=0.01).
A toy manufacturer wants to see how long, on average, a new toy captures children's attention. He tests 10 children selected at random and finds that their mean attention span is 33 minutes with a standard deviation of 6 minutes.
A geological study indicates that wells drilled in a certain area should strike water with probability 0.2. Find the probability that:
What the degree of freedom tells us? What are the degree of freedom for t- test, X^2-test, and for F-twst?
Explain what the coefficient of determination, R^2 (R-squared), measures. How is it related to the sample correlation coefficient?
By using.02 level of significance, carry out a 5-step hypothesis testing procedure to find out if new processes considerably reduced the wait time.
Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work so I can see how to do this for the future. This one is good example of what I can do in future for real estate.
Seventy-five percent of households say they woud feel secure if they had $50,000 in savings. You randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings.
Construct a relative frequency distribution for the weights of regular Coke by starting the first class at 0.7900 lb. and use a class width of 0.0050 lb.
Describe the types of decisions that do not involve uncertainty and risk and common approaches used for analyzying them.
LPP using the graphical method. Solveout the following linear programming problem utilizing the corner point method.
How many participants would be required to ensure that a 95% confidence interval for the mean difference in the number of drinks is within two drinks of the true mean? Assumed that the standard deviation of the difference in the mean number of dri..
Find the value of sample covariance in linear regression model
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