In: Math
Fill in the blanks for "x" and "y". ) A bulk supply of CAT6 cables were purchased to implement a wired office network. The network designer randomly tests 12 of the cables and finds the attenuation is on average 22.7dB with a sample standard deviation of 1.9 dB. She wishes to estimate the 95% confidence interval for the mean attenuation of all of the cables. Find the 95% confidence interval (α=0.05) for the mean attenuation rounded to the
We have given that,
Sample mean =22.7
Sample standard deviation =1.9
Sample size =12
Level of significance=1-0.95=0.05
Degree of freedom =11
t critical value is (by using t table)=2.201
Confidence interval formula is
=(21.49,23.91)
Lower confidence limit=21.49
Upper confidence limit=23.91