Based on the data set, the variance for this sample of tests is 4
<h3>How to find the variance for this sample of tests?</h3>
The sample of test is given as:
78, 79, 79, 81, and 83.
Calculate the mean, using:
Mean = Sum/Count
So, we have
Mean = (78 + 79 + 79 + 81 + 83)/5
Evaluate
Mean = 80
The variance is calculated as
This gives
= [(78 - 80)^2 + (79 - 80)^2 + (79- 80)^2 + (81- 80)^2 + (83- 80)^2)]/[5 - 1]
Evaluate the numerator and the denominator.
So, we have:
=16/4
Evaluate the quotient
= 4
Hence, the variance for this sample of tests is 4
Read more about variance at:
brainly.com/question/15858152
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First let’s convert the mixed numbers to improper fractions 2 1/4 =9/4
Then u get 4(X-9/4) =-3.7
Now your gonna divide both sides by four
4(X-9/4) over 4 = -3.7 over 4
4/4 =1 …X=-9/4
-3.7/4 = -0.925
Now you’re going to add 9/4 to each side
X-9/4+9/4=-0.925 +9/4
-9/4 + 9/4 =0 (X)
Now you have just -0.925 and nine fourths
I converted 9/4 —> 2.25
Then u still have -0.925
So add 2.25+-0.925 u get ur X which is 1.325 (this is ur answer)
Answer:
3/18 or 1/9
Step-by-step explanation:
2/3 divided by 6 = ?
2 1 3
- x - = -
3 6 18
3/18
5 minutes until 5, 60 minutes until 6, and 18 minutes until 6:18. that means it is 83 minutes
total length = total perimeter of dance floor
20 x 2 + 30 x 2 =
40 + 60 =
100 feet
Answer is D. 100
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