Question 9 of 10 Robert decided to use blocking to deal with an extraneous factor in his
experiment. What will blocking do to the subjects in his experiment?
O A. Divide them into groups based on whether he likes them
B. Divide them into groups based on similarities
C. Divide them into groups randomly
Ο Ο
D. Divide them into groups based on an alphabetized list
SUBMT

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Find the quotient with the restriction.

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?