Which of the following situations is an example of a dichotomous variable and would therefore suggest the possible use of a point-biserial correlation? a. Height
b. The number of correct answers on a 10 question true/false test
c. Age as categorized by pre-teenage, teenage, and post-teenage
d. Whether a computer is running the latest version of an operating system or an earlier version

x

step-by-step explanation:

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation:

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076