77 946
Assignments Done
98,5%
Successfully Done
In August 2019

# Answer to Question #18616 in Quantitative Methods for Elu

Question #18616
After running about 17 miles, marathon runners encounter a form of physiological stress which they call “hitting the wall.” To better pinpoint where in a race to expect this phenomenon, a sports physiologist has 12 male marathon runners race until each feels this stress. The variable of interest is the number of miles run until the stress occurs. These are 15.8 16.5 15.3 16.2 17.1 16.4 17.5 17.3 16.9 16.6 17.0 17.7 Construct the 95% confidence interval from the data.
Mean value for this data is 16.6917
After that we calculate sigma (square root of dispersion)
Sqrt(Mean(data^2)-Mean(data)^2)=0.673867
As known, 95% interval is for 2 sigma.
So, 2*0.673867 is 1.34, that is 95% confidence interval (in case of normal distribution)

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!