stat4210Hw1

# Stat4210Hw1 - value=0.00 The R-squared value is 95.7 which means 95.7 of the variability in total number of minutes spent on the service call can

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Brittney Brown June 9, 2010 Stat 4210 Homework 1 1. The model y= -0.580 + 15.04x could be used to estimate the number of minutes spent in total on the service call for the number of copiers ranging from 1 to 10. The slope is 15.04. We are 95% confident that the slope is between 14.04 and 15.96. For every additional copier serviced, there is an increase of 15.04 minutes for the total service call. The y-intercept,-0.580, holds no meaning because if there no copiers needed to be serviced no time would be spent on the service call and is outside of the range of the model. The null hypothesis states the coefficients are equal to zero. The alternative hypothesis states that the coefficients are not equal to zero. We reject the null hypothesis and state that the coefficient x is not equal to 0 of t=31.12, p-value= 0.00, also the suggested by ANOVA (f=968.66, p-

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Unformatted text preview: value=0.00). The R-squared value is 95.7%, which means 95.7% of the variability in total number of minutes spent on the service call can be explained by the number of copiers serviced. The value of s is 8.91. On an average, the measured service time values will vary about 8.91 minutes from what is predicted by this model. The model predicts that when 8 copiers need to be serviced, the time spent on the service time will be 120 minutes. The 95% confident and prediction intervals were between 115.82 and 123.59 and 101.31 and 138.09 respectively. We are 95% confident that the average service call in such a situation would be between 115.82 and 123.59 minutes. However 95% of the time, the service call values in such a situation would be between 101.31 and 138.09 minutes....
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## This note was uploaded on 02/03/2011 for the course STAT 4210 taught by Professor Bell during the Summer '10 term at Kennesaw.

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Stat4210Hw1 - value=0.00 The R-squared value is 95.7 which means 95.7 of the variability in total number of minutes spent on the service call can

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