Which interval contains the median lap time? O 36-37 seconds
An indoor running track is 200 meters in length. During a
3,000-meter race, runners must complete 15 laps of the
track. An electronic timing device records the time it
takes each runner to complete a lap for every lap in the
race. These are called lap times. The histogram below
displays the lap times for Stefano, a runner in the 3,000-
meter race.
O 37–38 seconds
038-39 seconds
39–40 seconds

Stu and ambrose are working together on a study of whether diet is related to students' mental health. first, they randomly select 10 students from the student center and 10 students from the office of counseling and psychological services. then, they ask students to rate their diet in terms of healthiness on a scale of 1-100 before completing a 20-item mental health survey. a) name one of the constructs being studied b) how was the construct you named above operationally defined in this experiment? e) was the variable you described above their independent variable, their dependent variable, or a controlled variable? d) what is a confounding variable? what is a potential confound in this study?

What is the difference between –12 and –5? what is the distance between –12 and –7 on a number line? units

Write an expression that represents the sum of 7 and x