IED Descriptive Statistics

mean, median, mode

• measures of data

• measures of center

• statistical data

• frequent data

The median splits our data so that ___% of our values are lower and____% higher.

(a)  

If we have ____ numbers, the median is the number in the direct middle.

• Odd

• Middle

• Normal

• Even

most frequently observed value in our dataset.

• Outliers

• Range

• Median

• Mode

The N represents (a)   data values in the formula for mean

Statistics that are grouped in either extreme direction are said to be _____.

• range

• outlier

• skewed

• IQR

The IQR for Brand A equals:

(a)  

Which measure of center should be used to compare the distributions?

(a)  

What is the difference between measures of center and measures of spread.

• Measure of center is skewed left while measure of spread is skewed right

• Measure of center focuses on the middle of data (average) vs. the measure of spread focuses on the range.

• Measure of center is the standard deviation of data. Measure of spread is the mode.

• Measure of center is calculated using the standard deviation. Measure of spread is calculated by finding the interquartile range.

Caluculate the mean of the data below.
3; 4; 5; 7; 7; 7; 7; 8; 8; 9; 9; 10; 10; 10; 10; 10; 11; 12; 12; 13; 14; 14; 15; 15; 17; 17; 18; 19; 19; 19; 21; 21; 22; 22; 23; 24; 24; 24; 24

• 13.95

• 139.5

• 1.395

• 0.1395