AnswersHigh School Math 2 AStandard Deviation

Standard Deviation Answers

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1
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She did not find the correct difference of 89 – 78. She divided by 5 instead of 4.✔ She put the negative sign for the 32 outside the parentheses.She forgot to take the square root of –135.6.

A
She did not find the correct difference of 89 – 78.
B
She divided by 5 instead of 4.
C
✔ She put the negative sign for the 32 outside the parentheses.
D
She forgot to take the square root of –135.6.
2
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8.40✔ 8.458.829.00

A
8.40
B
✔ 8.45
C
8.82
D
9.00
3

Adimas found the mean of her 11 math test scores for the first semester.

Answers:
σ2 =:71.36
σ =:8.45
4

Question text not available

Answer:

86921

5

Which statements are true about the data sets? Check all that apply.

A
Set A is symmetrical.
B
Set B has the same mean and median.
C
Set B is right skewed.
D
Set A is left skewed.
E
The median of set A is larger than the mean of set A.
6

Which statements are true about the curve? Check all that apply.

A
The standard deviation of the data is 64.
B
The variance of the data is 49.
C
The median is 64.
D
The data point 75 is less than one standard deviation from the mean.
E
The data point 50 is two standard deviations away from the mean.
7

Which statement is most likely to be true?

A
The scores from Mrs. Jones’s class are the closest to the class mean.
B
The scores from Mrs. Rijo’s class are the closest to the class mean.
C
The scores from Mr. Phan’s class are the closest to the class mean.
D
The scores from Mrs. Scott’s class are the closest to the class mean.
8

Which of the distributions is left skewed?

A
Option A
B
Option B
C
Option C
D
Option D
9

Question text not available

A
She did not find the correct difference of 89 – 78.
B
She divided by 5 instead of 4.
C
She put the negative sign for the 32 outside the parentheses.
D
She forgot to take the square root of –135.6.
10

Question text not available

Answer not available
11

Adimas found the mean of her 11 math test scores for the first semester. x = ≈ 81 Using 81 as the mean, find the variance of her grades rounded to the nearest hundredth. σ2 = Find the standard deviation of her grades rounded to the nearest hundredth. σ =

Answers:
Selection 1:71.36
Selection 2:8.45
13

Question text not available

Answer:

86921

14

Question text not available

Answer not available
16

Which statements are true about the curve? Check all that apply.

A
The standard deviation of the data is 64.
B
The variance of the data is 49.
C
The median is 64.
D
The data point 75 is less than one standard deviation from the mean.
E
The data point 50 is two standard deviations away from the mean.
17

Which statement is most likely to be true?

A
The scores from Mrs. Jones’s class are the closest to the class mean.
B
The scores from Mrs. Rijo’s class are the closest to the class mean.
C
The scores from Mr. Phan’s class are the closest to the class mean.
D
The scores from Mrs. Scott’s class are the closest to the class mean.

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