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The author recorded actual temperatures along with temperatures that were predicted 5 days earlier. Results are listed below. Construct a 99% confidence interval of the mean of the population of "actual/forecast" differences. What does the result suggest about the forecast?
Actual: 80, 73, 78, 73, 82, 81, 74, 62
Forecast: 80, 79, 79, 78, 73, 79, 70, 69
A standard deviation of 350 hours. the manufacturer is considering a warranty. what proportions of the screens have a life between 1500 and 2500 hours?
In a multiple regression equation two independent variables are considered, and the sample size is 25. The regression coefficients and the standard errors are as follows.
Determine the median, and the standard deviation. Determine the coefficient of skewness using Pearson's method. Listed below are the commissions earned ($000) last year by the sales representatives at the Furniture Patch, Inc.
In an analysis of variance problem involving 3 treatments and 10 observations per treatment, SSE = 399.6. The MSE for this situation is:
Let Xt=1+e t- 0.5et-1 , t=1,2,3,...., where et~llD(0,2),the variance of et is 2. a) Compute the mean of Xt b) Compute the variance of Xt c) Find the correlation between Xt and et-1
Utilizing Excel data analysis calculate t distribution also deduce the result. Study of variance is used to investigate if there is a difference in the mean mileage of the three cars.
A sample of n=20 has a mean of M = 40. If the standard deviation is s=5, would a score of X= 55 be considered an extreme value? Why or why not?
I am charged with sampling expense report submissions for accuracy. We get 8000 T&E claims, and want to sample a subset making inferences about the population. I can probably get a good estimate of the populations' SD, how would i calculate required ..
a companys manufacturing process uses 500 gallons of water at a time. a scrubbing machine then removes most of a
Use a one-tailed hypothesis test with an alpha level of .01 to demonstrate. Calculate the estimated r squared, the percentage of variance accounted for, to measure the size of this effect.
let s a b c be a sample space.a suppose p is a probability on s and that you know pa 0.2 and pa b 0.5 then what are
A recent study of the Greater Los Angeles Taxi Driver Association demonstrated that the average or media tariff that they charge from Hermosa Beach to the International Airport of Los Angeles is $18.00
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