The table shows the results of two 7th grade surveys that Roddy took to find out how many

hours of sleep 7th graders at his school get on

a typical school night:

Based on the sample data, which of the following

is the closest to the mean number of hours of

sleep a 7th grade student gets?

Group of answer choices

8

7

8.25

7.75

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

What is the anwers for 9+2x=5x-3-x

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?