15, 16, 16, 18, 19, 20, 20, 21, 22, 23
The data above represents the number of students in 10 7th grade classes.

a. What is the median of the data:

b. What number of people describe the first quartile:

c. What number of people describe the third quartile:

d. What number of people describe the interquartile range:

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

What is a graph with a never ending line called?

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air