Statistics Algebra Standard Deviation

What is the standard deviation for the data given:

{12, 13, 29, 18, 61, 35, 21}

• 293.67

• 15.87

• 17.14

• 41.98

Which profession had the greatest IQR of salaries?

• Nuclear engineer

• Police officer

• Musician

• Impossible to tell

Which data set has the largest standard deviation?

• Set 1

• Set 2

• They have the same standard deviation

What is the Q1 (25th Percentile) for this dot plot?

• 75

• 80

• 85

• 95

Standard deviation describes what characteristic of a set of data?

• The number of data values.

• The expected data value.

• The spread of the data values from the mean.

• The range of the data values.

It is a number which describes the spread of the distribution.

What does σ represent?

• sample standard deviation

• population/distribution standard deviation

• sample mean

• population/distribution mean

The data sets show the test scores of a group for the last two tests.

Test 1: {75, 75, 85, 80, 65, 70, 65} Test 2: {95, 85, 85, 90, 90, 95, 100}

Which data set had the smaller standard deviation?

• Test 1 with a standard deviation of 7.5

• Test 2 with a standard deviation of 5.6

• Test 1 with a standard deviation of 6.9

• Test 2 with a standard deviation of 5.2

• 15.17

• 3.85

• 4.22

• 5

Find the Upper Quartile (Q3) of the following numbers:

84, 88, 72, 74, 98, 16, 94

• 72

• 88

• 94

• 22