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1. For the y and x values listed in file XR15066, obtain the simple linear regression equation, then analyze the residuals by (a) constructing a histogram, (b) using a normal probability plot, (c) plotting the residuals versus the x values, and (d) plotting the residuals versus the order in which they were observed. Do any of the assumptions of the simple linear regression model appear to have been violated?
2. For the regression equation obtained in Exercise 15.57, analyze the residuals by (a) constructing a histogram, (b) using a normal probability plot, (c) plotting the residuals versus the x values, and (d) plotting the residuals versus the order in which they were observed. Do any of the assumptions of the simple linear regression model appear to have been violated? Comment on whether any of the years were associated with especially high or low fuel consumption for the number of flying hours during the year.
a poll of 200 american adults showed that 144 though that chemical dumps are among the most serious environmental
Construct a tree diagram and list the sample space. Assuming that boys and girls are equally likely, determine the probability that the couple has two girls.
A coin was flipped 60 times and came up heads 38 times (a) at the time .10 level of significance is the coin based towards heads? show your decision rule and calculations (b) calculate a p value and interpet.
compute the correlation coefficient for the data belowx values -5 -1 1 2y values 3 -1 -3 3a 0.641b 0.453c - 0.411d -
At the .01 significance level, is there a difference in the use of the four entrances?
The university policy department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with mean of 6.0 tickets per day. Find the p..
Annually from tornadoes in the U.S.A. is less than 30. If a sample of 9 randomly selected years had a standard deviation of 29, is the claim believable? Use = .01?
please answer this question using r code. the answer for this quesiton can be easily be found with a google search
Joe received a z score of -1.50 on a classroom test. This means that, compared to his classmates, Joe's score was...?
Standard deviation of 0.04135 (4.135%). Treating the next 12 months as a random sample, what is the probability that the mean rate of return will be positive?
Use Hypothesis testing to determine if the data indicate that there are significant differences among the three therapies? Test at the .05 level of significance.
the heights of pecan trees are normally distributed with a mean of 10 feet and a standard deviation of 2 feet.what is
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