Need help being timeddd !
1 answer:
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Answer:
chisquare = 31.667
degree of freedom = 2
Step-by-step explanation:
Formula for chisquare test = (O-E)²/E
total number observations= 60 + 25 + 15 = 100
Estimated E,
80% x 100 = 80
15%x100 = 15
5% x 100 = 5
chisquare =
= 5 + 6.67 + 20
= 31.667
from the calculation above the value of the chisquare statistic = 31.67
the degree of freedom is the number of samples in the test n - 1
= 3-1
= 2
I have solve this question also in a tabular form to aid understanding in the file i uploaded.
thank you and good luck!
Hi!
Let's separate this shape into three sections to make it easier to find the area. (see image)
Let's start with the green shape.
The base of the green shape is 20. The height is 6.
20 x 6 = 120
Now the blue shape.
The base of the blue shape is 20, the height is (9 + 6) 15.
20 x 15 = 300
Now the red shape.
The base of the red shape is (20 - 10) 10, the height is 5.
10 x 5 = 50
Add all of the areas together.
120 + 300 + 50 = 470
The answer is 470
Hope this helps! :)
Let's separate this shape into three sections to make it easier to find the area. (see image)
Let's start with the green shape.
The base of the green shape is 20. The height is 6.
20 x 6 = 120
Now the blue shape.
The base of the blue shape is 20, the height is (9 + 6) 15.
20 x 15 = 300
Now the red shape.
The base of the red shape is (20 - 10) 10, the height is 5.
10 x 5 = 50
Add all of the areas together.
120 + 300 + 50 = 470
The answer is 470
Hope this helps! :)