A number cube with the numbers 1 through 6 is rolled. Find the given probability. P(number < 2)
A. start fraction 1 over 6 end fraction
B. start fraction 2 over 6 end fraction
C. The fraction is four-sixths.
D. three-sixths

Solve for x, y, and z. show all steps.

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

How can i differentiate this equation?