Statistic Quiz

At a large company, the majority of the employees earn from $20,000 to $30,000 per year. Middle management employees earn between $30,000 and $50,000 per year while top management earn between $50,000 and $100,000 per year.

A histogram of all salaries would have which of the

following shapes?

• Symmetrical

• Uniform

• Skewed to the right

• Skewed to the left

The average polar bear weighs 1200 lbs with a standard deviation of 100 lbs. 95% of bears are within what range of weights?

• 1100 lbs to 1300 lbs

• 1000 lbs to 1400 lbs

• 900 lbs to 1500 lbs

A polar bear is in the 34th percentile for weight. What does that mean?

• His z score for weight is z = .34

• He is 34% of the average weight of 1200 lbs or 408 lbs.

• He is 34% above average weight or 1200 lbs or 1608 lbs.

• He is larger than 34% of the other polar bears.

What percent of all the data is between 50 and 70?

• 25%

• 33%

• 40%

• 50%

Which is NOT a correct formula?

• upper outlier > Q₃ + 1.5(Q₃ - Q₁)

• lower outlier > Q₃ - 1.5(Q₃ - Q₁)

• 
• 

All of the below sets have the same mean.
Set 1-Standard Deviation=3.1
Set 2-Standard Deviation=4.9
Set 3-Standard Deviation=1.7
Set 4-Standard Deviation=3.2
Which set of data probably has the points closest to the mean?

• 1
• 2
• 3
• 4

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%
• 95%
• 99.7%
• 50%

What does this symbol represent?

• Standard Deviation
• Variance
• Mean Absolute Deviation
• Sigma

Find the median of these numbers:
4, 2, 7, 4, 3

• 2
• 5
• 7
• 4

What is the standard deviation for the data given:
{12, 13, 29, 18, 61, 35, 21}

• 293.67
• 15.87
• 17.14
• 41.98