posted by Jake .
Check my answers please!
Thanks a lot.
Five students reported that the previous night they slept: 7,8,7,10,9 hours.
Calculate the sample varience and standard deviation.
sample varience = 1346.5
standard deviation = 36.7
Consider this. Ths standard deviation can never be larger than the range of scores. Assuming that you are still talking in hours, you answer is much larger.
mean = 8.2
Differences obtained by subtracting the score from the mean =
Squaring each of these gives you
Totaling 6.8. Dividing this by N (5) gives you 1.36 = variance
The square root of the variance is the standard deviation.
I hope this helps. Thanks for asking.