Below are the data collected from two random samples of 500 american adults on the number of hours they work per day (rounded to the nearest hour):

ryan concludes that adults spend a mean of 8 hours working each day. malia thinks the mean is 9 hours. who is correct—ryan or malia? explain your answer in two or three sentences.

Indicate the formula for the following conditions: p^c(n,r)=

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?

Which fraction represents the ratio 35 : 42 in simplest form