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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Answer:
100*5(120) = $60,000 for 120 students
Step-by-step explanation:
Answer:
28 pans of muffins per week
Step-by-step explanation:
To solve the above question, we know that:
1 day = 4 pans of muffins
7 days = x pans of muffins
Cross Multiply
1 day × x pans of muffins = 7 days × 4 pans of muffins
x = 28 pans of muffins
Since, 7 days = 1 week
Heather makes 28 pans of muffins per week
Your answer would be 42.5.
Divide 106.25 by 5 (which is 21.25) then multiply 21.25 by 2.
