Standard Deviation

Question 1

A data set has the following characteristics: Mean: 4.9 Median: 6 Mode: 6 Variance: 4 The z-score is the number of a data value is away from the .

Revolt · Accepted Answer

0; (5 - 4.9) / 2; (6.5 - 4.9) / 2

Question 2

Given that z = –2 and z = –1, which of the following do you know?

Revolt · Accepted Answer

The standard deviation is 30.; The mean is 80.; The data point x = 20 is 2 standard deviations from the mean.; The data point x = 50 is 1 standard deviation from the mean.

Question 3

The data value x exists in two data sets: A and B. The mean is equal for both data sets. If the standard deviation for set A is greater than the standard deviation for set B, which is true for zx for set A?

Revolt · Accepted Answer

It is less than zx for set B.

Question 4

Question 24

Revolt · Accepted Answer

864; 29.4

Question 5

Why does the formula use “n – 1” in the denominator?

Revolt · Accepted Answer

The data is a sample and is expected to be less dispersed from the mean.

Question 6

What is the standard deviation? ✔ 29.432.9127.4432

Revolt · Accepted Answer

✔ 29.4

Question 7

Why does the formula use “n – 1” in the denominator?

Revolt · Accepted Answer

The data is a sample and is expected to be more dispersed from the mean.

Question 8

Check each of the components below that you included in your response.

Revolt · Accepted Answer

The standard deviation will decrease when the outlier is removed.; Standard deviation represents the spread of data from the mean.; Removing a high-value outlier decreases the spread of data from the mean.; Removing a low-value outlier decreases the spread of data from the mean.; In both cases the standard deviation decreases.

Question 9

What is the variance?

Revolt · Accepted Answer

84000; 290

Question 10

Question 30

Revolt · Accepted Answer

84000; 290

Standard Deviation Answers

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