19/04/2024 This Is For The REVIEW TEST! on 22/04/2024

Question 1

To compare sets of data what do you use?

Answer 1

Averages

Question 2

What can be used to represent a group of data?

Answer 2

Numbers

Question 3

What are the four types of averages?

Answer 3

Mode, Median, Mean and Range

Question 4

What is the Mode (general meaning)?

Answer 4

The Mode is the most common value

Question 5

In a group of data how do you find the Mode (general meaning)?

Answer 5

Identify the data that appears most often

Question 6

What is the Median (general meaning)?

Answer 6

The Median is the middle numbers when the set of data is ORDERED

Question 7

How do you order data for Median (general meaning)?

Answer 7

Smallest to largest

Question 8

What can you do to help find the answer for a set of data for Median (general meaning)?

Answer 8

Cross out from both sides

Question 9

What happens if there are two numbers left when calculating the Median (general meaning)?

Answer 9

Add them both and divide answer by two

Question 10

How do you find the Range (general meaning)?

Answer 10

The range measures the spread of the data set (smallest to largest)

Question 11

How do you find the mean (general meaning)?

Answer 11

The mean add the numbers together and divide them by how many there are

Question 12

How do you construct grouped frequency tables?

Answer 12

Go along the set if data and mark each item with a tally mark in the table, fill in the frequency collumn, find the total frequency

Question 13

How do you find the mode (frequency tables)?

Answer 13

Highest frequency

Question 14

How do you find the range (Calculating averages from frequency tables)?

Answer 14

Highest value - lowest value

Question 15

How do you find the mean (frequency tables)?

Answer 15

Total fx/ Total f

Question 16

How do you find the median (frequency tables)?

Answer 16

1. n+1/2 n= number of values there are (calculate total frequency add 1 divide by 2
2. Create collumn cf (cumalitive frequency) start with the first set of data from frequency collumn keep adding the row underneath till you get to the number that is above the total frequency
3. The number after you added add 1 divide by 2 NOT BELOW f
4. Finally look at the ACTUAL DATA FROM THE SET OF DATA and use that as your ANSWER

Question 17

How do you find the mode (group frequency tables)?

Answer 17

Look for the highest frequency, write down the modal class from the left collumn

Question 18

How do you find the median (group frequency tables)?

Answer 18

1. Find the position of median (n+1/2) n = total number of value there are).
2. Work out the cumalitive frequency:
3. Start with the first set of data from frequency column
4. Keep adding the row underneath till you get to the number that is above the total frequency
5. The number after you added add 1 divide by 2) NOT BELOW
6. Finally read the median from the left collumn (look at the ACTUAL DATA FROM THE SET OF DATA and use that as your ANSWER)

Question 19

How do you find the mean (ranged data)?

Answer 19

1. Find the midpoint of each class (x the ACTUAL DATA), add
2. Calculate fx collumn (fx = frequency and actual data sum), finally mean x total f
3. Find the middle number between the ACUTAL DATA for example 0-50 = 25
4. Figure out the fx (if the x isnt 1 number create a new collumn for it with the middle number of the actual data)
5. F= frequency x (x) actual data finally do total fx/total f