A study was carried out to investigate the relationship between x = the number o
ID: 3220771 • Letter: A
Question
A study was carried out to investigate the relationship between x = the number of components needing repair and y = the time of the service call (in minutes) for a computer repair company. The number of components and the service times for a random sample of 20 service calls were used to fit a simple linear regression model. Partial computer output is shown below. One of the numbers in the above computer output indicates the magnitude of a typical difference between an observed service time and the service call time predicted by the linear model. What is the value of this number? a. 8.121 b. 0.7988 c. 11.6205 d. 12.31 e. 19.058 If there is no evidence of a linear relationship between x and y, what decision will be made in a test of H_0 beta = 0 versus H_0 beta notequalto 0? a. Reject H_0 and conclude that there is no evidence that the linear model is useful b. Reject H_0 and conclude that there is evidence that the linear model is useful c. Fail to reject H_0 and conclude that there is no evidence that the linear model is useful d. Fail to reject H_0 and conclude that there is evidence that the linear model is useful e. Not enough information to say.Explanation / Answer
8) The value of the number is : 11.6205
9) Reject Ho and conclude that there is no evidence that the linear model is useful
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