The mean score on a biology exam taken by all undergraduate students in a college in a particular year is 67.8 with a standard deviation of 11.5. the standard error of the mean for a sample of 70 students is and the margin of error of the mean is

Standard error = standard deviation/sqrt(sample size) = 11.5/sqrt(70) = 1.375

Margin of error = 67.8 + or - 1.375

the answer is b.)

< 1=< 2

if the pizza is divided equally into 2 equal halves then you would get

πr^2/2

where r is the radius of the pizza.

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