2/25 7th grade

a statistical measure of data, often the mean or the median

• center
• interquartile range
• shape
• spread

a measure of center, found by finding the sum of the data values and dividing by the number of pieces of data

• median
• mean
• shape
• spread

Abdul surveyed a random sample of adults to find out how many hours per night they sleep. The results are shown below.

7,7,6,8,8,7,7,8,6,7,5,8,8,7,6,7,6,9,6,7

What is the mean number of hours of sleep for the population from which the sample was drawn?

Find the median of the data.

1,4,6,7,10,20,61,70

• 7

• 8.5

• 9

• 8

What is the Interquartile range?

• The median of data less than the median

• The difference between the 1st and 3rd quartiles

• The median of data more than the median

• The difference between the greatest and least number of data

Ms. Cassermere wants to know 7th grade students' favorite tv show. She picks 20 students to ask.

What is the population?

• All students at Commodore

• All students in 701

• The 20 students who get picked

• All students in 7th grade

• 15

• 27

• 45

• 75

150 people were polled on their favorite sport.  Based on the table, if you asked only 25 people what their favorite sport is, how many would say soccer is their favorite sport?

• 5 people
• 6 people
• 8 people
• 10 people