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statistics/ Data Analysis (Statistical questions (A statistical question…
statistics/ Data Analysis
mean
step 3 = then divide the number of addends
step 2 = add all of your numbers together
step 1 = list the numbers from least to greatest
example = 1,7,5,9,8,10
1 = 1,5,7,8,9,10
2 = 40
3 = 6.666666667
Mode
step 2 = find the number that is repeated the most
step 1 = list the numbers from greatest to least
example = 2,6,7,4,7,3
1 = 2,3,4,6,7,7
2 = 7 is shown 2 times
so, that is the mode
I.Q.R
Step 2: Find the median.
Step 3: Place parentheses around the numbers above and below the median. Not necessary statistically, but it makes Q1 and Q3 easier to spot.
Step 1: Put the numbers in order.
Step 4: Find Q1 and Q3.
Step 5: Subtract Q1 from Q3 to find the interquartile range.
Median
Step one- Arrange the numbers from least to greatest
18,19,21,24,27
Step 3- If there are two middle numbers, find the mean of these two numbers.
Example: 18,19,20,21,24,25,21+20=41 41 divided by 2 = 20.5
So, 20.5 is the median
Step 2- Find the middle number
The number in the middle would be 21. So 21 would be the median
M.A.D.
Step 1- Find the mean
59+61+59+54+68+59 divided by 6= 60
step 2- Find the difference between each point and the mean
60-59= 1 61-60=1 and so on then you add all of the numbers up and divide by the number of numbers there are 18 divided by 6 = 3
so 3 is the M.A.D.
Statistical questions
A statistical question can have multiple answers rather than one answer
For example, A statistical question would be,
How many hours do the people in our neighborhood walk a week.
A statistical question is one that can be answered by collecting data and where there will be variability in that data.
box plot
step 1- order the set from least to greatest
step 2- find the median of the data set
step 3- find Q1 and Q3
step 4- draw a number line with all of the numbers from the data set (and the numbers in between)
step 5- then mark the first second and third quartile
*
line plot
Step 1 = gather all of your data
Step 2 = organize the numbers in order from least to greatest
1,2,2,2,3,3,3,3,4,4,5,5,5
Step 3 = create a horizontal line with all of the numbers from least to greatest
step 4= mark an x above the number every time data occurs
range
step 3= find the difference between these two numbers
27-18=9
step 2 = find the highest and lowest number
18 and 27
step 1 = Order the numbers from least to greatest
18,19,21,24,27
step 3 = Draw a bar extending from the lower value of each interval to the lower value of the next interval.
for Example,
step 2 = On the horizontal axis, place the lower value of each interval
step 1 = On the vertical axis, place frequencies. Label this axis "Frequency"
histograms
