Vocabulary
Collections of numbers such as scientific measurements, surveys, cost of every item in a store and brightness of stars in a galaxy.
What are data sets?
Mathematical Procedure:
To find the mean.
T or F: Data sets can have more than 1 mean?
1st- add all the numbers
2nd divide by the total numbers in the data set
Mathematical Procedure:
To find the median of an even data set.
To find the median of an odd data set.
T or F: Data sets can have more than 1 median?
Even: 1st - Order least to greatest
2nd - Find the number in the middle
Odd: 1st - Order least to greatest
2nd - Find the mean of the 2 numbers in the middle
Mathematical Procedure:
To find the mode.
T or F: Data sets can have more than 1 mode?
The value in the data set that occurs the MOst often.
True.
The difference between the greatest and least values in a data set.
Describe how to find THAT number.
What is the range?
Subtract the least number from the greatest number.
Name three properties of data sets that can give us meaningful, easy to understand information about the data set.
Mean
Medium
Mode
Sam's math scores are the following:
100, 95, 100, 65, and 98
What is mean?
458 / 5 =
91.6%
Sam's math scores are the following:
100, 95, 100, 65, and 98
What is median?
65, 95, 98, 100, 100
98
Sam's math scores are the following:
100, 95, 100, 65, and 98
What is mode?
100
Sam's math scores are the following:
100, 95, 100, 65, and 98
What is range?
100 - 65 = 35
The number in the middle that splits the data set. Describe how to find the middle number.
What is the median?
Ordered from least to greatest. One half is less than or equal to the median, one half is greater than or equal to the median.
May's outside temperatures were the following:
55, 45, 33, 88, 76, 44, and 49
What is mean?
390/ 7 = 55.7
May's outside temperatures were the following:
55, 45, 33, 88, 76, 44, and 49
What is median?
33, 44, 45, 49, 55, 76, 88
49
May's outside temperatures were the following:
55, 45, 33, 88, 76, 44, and 49
What is mode?
33, 44, 45, 49, 55, 76, 88
No mode
May's outside temperatures were the following:
55, 45, 33, 88, 76, 44, and 49
What is range?
33, 44, 45, 49, 55, 76, 88
88-33 = 55
The value you would get if you made all values the same. (Smoothed then out)
What is the mean (average)?
Rain in inches for the last week are the following:
0.3, 0, 2.7, 0.2, 1.6, 1.08, 2.7
What is the mean rounded to the nearest hundredth of an inch?
8.58 / 7
1.23 inches of rain fall
Rain in inches for the last week are the following:
0.3, 0, 2.7, 0.2, 1.6, 1.08, 2.7
What is the median rain fall in inches for last week?
0, 0.2, 0.3, 1.08, 1.6, 2.7, 2.7
1.08 inches of rain fall
Rain in inches for the last week are the following:
0.3, 0, 2.7, 0.2, 1.6, 1.08, 2.7
What is the mode rain fall in inches for last week?
0, 0.2, 0.3, 1.08, 1.6, 2.7, 2.7
2.7 inches of rain fall
Rain in inches for the last week are the following:
0.3, 0, 2.7, 0.2, 1.6, 1.08, 2.7
What is the range rain fall in inches for last week?
0, 0.2, 0.3, 1.08, 1.6, 2.7, 2.7
2.7 inches of rain
The value set that occurs MOst often.
What is the MOde?
Evaluate the following information:
Test scores: 100, 100, 0, 99, 98.
What is the mean, median, mode and range for these scores? Which property will give the reader misinterpretation of this information?
Mean: 79.4
Median: 99
Mode: 100
Range: 100
Evaluate the following information:
Test scores: 100, 100, 88, 88, 0
What is the mean, median, mode and range for these scores?
0, 88, 88, 100, 100
Mean: 75.2
Median: 88
Mode: 88, 100
Range: 100
Evaluate the following information:
Test scores: 0, 0, 27, 33, 55, 55, 76
What is the mean, median, mode and range for these scores?
0, 0, 27, 33, 55, 55, 76
Mean: 35
Median: 33
Mode: 0, 55
Range: 76
Evaluate the following information:
Test scores: 4, 6, 12, 1, 2, 3, 3, 10
What is the mean, median, mode and range for these scores?
1, 2, 3, 3, 4, 6, 10, 12
Mean: 5.125
Median: 3.5
Mode: 3
Range: 11