Serena bought 5 shirts for $6 each and spent $7 on lunch. She paid for the shirts and lunch using her debit card. The change in
1 answer:
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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:
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<u>Answer:</u>
The correct answer option is C. pounds
<u>Step-by-step explanation:</u>
We are given that Emma has pounds of potato salad and
pounds of egg salad for a picnic.
We are to find out how much more pounds Emma has of potato salad than the egg salad.
To find this, we simple need to subtract the pounds of egg salad from the pounds of potato salad.
pounds