General Maths
True or false, you have an external exam this year
True
How do you calculate the mean?
Add all the data points together and divide by how many there were.
What is the mode?
The most frequent value in a data set.
What is the median of the following data set: 2, 4, 6, 8, 10
6
What is the mode of the data set: 3, 4, 4, 5, 6
4
What does BOMDAS stand for?
Brackets, Other, Multiplication, Division, Addition, Subtraction
If a data set has 10 numbers, how do you find the median?
Average the two median numbers.
What is the difference between the mean and median?
The mean is the average of all data points while the median is the middle value when the data is in ascending order.
Find the range of the following data set: 5, 10, 15, 20, 25
25-5= 20
Is there an outlier in the following data: 5, 4, 100, 206, 195, 108, 167, 184
Yes, 5 and 4
What letter is commonly used in algebra?
x
How do you calculate the Q1 and Q3?
Q1 is the median of the lower half and Q3 is the median of the upper half of data.
What does the five-number summary consist of?
Minimum, Q1, Q2/median, Q3, Maximum
Calculate the mean of the following data set: 5, 5, 5, 10, 80, 495
100
Q1 = 6, Q2 = 8, Q3 = 10. What is the IQR?
10-6 = 4
What is Pythagoras' Theorem?
a2 + b2 = c2
What can outliers affect and why?
The mean as they can pull the average towards them, skewing it.
Describe how data can be skewed differently.
Positively (to the left), equally, negatively (to the right)
What is Q1 of the following data?
1, 3, 4, 7, 9, 11, 13
3
What is Q2 of the following data?
1, 3, 4, 7, 9, 12, 13
11
What is the value of any number raised to the power of 0?
1 (except for 0^0)
What does the IQR range measure? How do you calculate this?
What is the relationship between the mean, median and mode in a normal distribution?
They are all equal in a normal distribution.
Draw a box plot on the board using the following data:
1, 3, 4, 6, 7
In a data set of 15 numbers, the median is the value of the ___th number when ordered.
8th