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Alinara [238K]
3 years ago
5

The data set on the right represents . Which formula should be used to calculate the variance? A teacher recorded all of his stu

dents’ grades on the final exam as: 62, 77, 78, 80, 82, 82, 83, 84, 85, 87, 89, 95 Consider the formulas: A: s squared = StartFraction (x 1 minus x overbar) squared + (x 2 minus x overbar) squared + ellipsis + (x n minus x overbar) squared Over n minus 1. B: s = StartRoot StartFraction (x 1 minus x overbar) squared + (x 2 minus x overbar) squared + ellipsis + (x n minus x overbar) squared Over n minus 1 EndFraction EndRoot. C: Sigma squared = StartFraction (x 1 minus mu) Squared + (x 2 minus mu) squared + ellipsis + (x N minus mu) squared Over N EndFraction. D: Sigma = StartRoot StartFraction (x 1 minus mu) Squared + (x 2 minus mu) squared + ellipsis + (x N minus mu) squared Over N EndFraction EndRoot
Mathematics
1 answer:
BARSIC [14]3 years ago
7 0

Answer:The data set on the right represents the population.

Step-by-step explanation:

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Line DCE is parallel to line AB
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Answer:

Angle DCA = Angle CAB. (Alternate Interior Angle)

Angle DCA = 68°

Angles(DCA + ACB + BCE) = 180°. (Linear Pair)

Angle ACB + 68° + 33° = 180°

Angle ACB = 79°

Therefore,

Angle ABC = 33°. (Alternate Interior Angle)

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3 years ago
the 90 members of a service Club had the opportunity to vote for a club officers on Tuesday or Wednesday 3/5 of the members vote
oee [108]
For this problem, it is really important to find who voted on Tuesday first.
90×(3/5)= 54 
54 people voted on Tuesday. Since the people who voted on Wednesday was 1/4 of the members who did not vote on Tuesday.
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9 people voted on Wednesday. Now add Tuesday and Wednesday together to find the ones that didn't vote.
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3 years ago
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How many dimensions are in a point? <br><br> A. 0<br> B. 1<br> C. 2<br> D. 3
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Answer:

0 dimensions are in a point

6 0
3 years ago
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According to the recent poll, 22 1/4% of the people polled said that they approved of the city plan to expand the library. If 10
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Answer:

Some 224 people were in favor of the expansion.

Step-by-step explanation:

Given that, according to the recent poll, 22 1/4% of the people polled said that they approved of the city plan to expand the library, if 1004 people was polled, to determine how many were in favor of the expansion should be done the following calculation:

1/4 = 0.25

100 = 1004

22.25 = X

1004 x 22.25 / 100 = X

223.39 = X

Thus, some 224 people were in favor of the expansion.

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Step-by-step explanation:

20% of 240 is 48

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