Mean
The scores of three students on a math test are 80, 85, and 90. What is the mean score?
Answer: (80 + 85 + 90) / 3 = 255 / 3 = 85
Find the Median of this data set...
{3,4,5,6,7,8,9}
Median = 6
Find the Mode of the set...
{2,5,2}
Mode = 2
Find the Range for the set...
{1,3,6,10,3}
Range = 9
10-1=9
take the sum of all the numbers and divide by the # of numbers
A student receives the following scores on five quizzes: 70, 75, 80, 85, and 90. What is the mean score?
Answer: (70 + 75 + 80 + 85 + 90) / 5 = 400 / 5 = 80
Find the Median of this data set...
{1,2,3,4}
Median = 2.5
Find the Mode of the set...
{3,6,2,5,1,3}
Mode = 3
Find the Range for the set...
{2,5,6,3,10,13,12}
Range = 11
13-2=11
what is the formula for IQR
Q3 - Q1
Question: The ages of four siblings are 12, 15, 18, and 21. What is the mean age?
Answer: (12 + 15 + 18 + 21) / 4 = 66 / 4 = 16.5
Find the Median of this data set...
{30,20,21,22,23,25}
Median = 22.5
Find the Mode for the set....
{2,3,4,5,3,4,1,4}
Mode = 4
Find the Range for the set...
{20,22,23,25,20,25}
Range = 5
25-20=5
What is the median of a data set ?
the number that is found in the middle once you put all the numbers in order from least to greatest
Question: In a science experiment, a student records the following weights (in grams) of different samples: 150, 165, 145, 170, and 160. What is the mean weight?
Question: A teacher records the following test scores for a class of 10 students: 78, 82, 85, 90, 76, 88, 91, 84, 80, and 87. What is the mean score?
Find the Median of this data set...
{12,2,5,6,7,8,10}
Median = 7
Find the Mode of the set...
{2,1,2,1,3,4,5,6,10,99}
Mode = 1 and 2
Find the Range for the set...
{199,99,89,99,198,189}
Range =110
199-89=110
What do you do when you have 2 numbers in the middle of a data set?
add them together and divide by 2
Question: A teacher records the following test scores for a class of 10 students: 78, 82, 85, 90, 76, 88, 91, 84, 80, and 87. What is the mean score?
Find the Median of this data set...
{100,101,102,102,104,110}
Median = 102
Find the Mode of the set...
{1,2,3,4,5,6,7,8,9,0}
Mode = NONE
Find the Range for the set...
{100,200,188,99,100,199}
Range = 101
200-99=101
Which of these is a statistical question?
How far did Evelyn walk in total yesterday? What time does the movie end? What is the average score of the students test score? If you have 7 boxes, how many apples can you fit in all the boxes?
What is the average score of the students test score?