Question 984513
Big B
Range is 59 to 175 or 116
SD is 34.96
Variance is 1222.29 (square sd)
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Cheesy
Range is 79 to 200  or 121
SD is 35.50
Variance is 1260.55
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Add the numbers; square the total, and divide by the number of items in data set.
Then square each number
Then add up the squares and divide by number of items in data set.
Subtract what you did first from what you did second.
Divide by ONE LESS than the number of items.
That is the variance.
Take the square root of the variance, and you have the sd.
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Compare them with a two sample t-test
Ho=mu1=mu2
Ha=not equal
alpha=0.05 P{reject ho|ho true}
test stat t with df 16
critical value: abs(t)> 2.12
Calculation is difference in means over  sqrt { (s1^2/n1)+(s2^2/n2)}
Result t=-2.157.  This is greater than the critical value (mean 1 is less), so that one concludes at the p=0.03 level that the means are not equal.