Session 8

Roger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is Roger's median score?

• 127
• 155
• 156
• 193

To find the _________ you add up all the numbers and then divide by how many numbers you have.

• Mean
• Median
• Mode
• Range

The scores awarded to 15 students for an assignment were as follows:

7 9 8 7 7 8 5 6 9 8 8 7 4 9 8

What is the mode?

• 6

• 7

• 8

• 9

A normal distribution in kurtosis is named to be

• Leptokurtic

• Platykurtic

• Normal kurtosis

• mesokurtic

Statistics used to describe or summarize a set of observations is known to be

• Descriptive statistics

• Comparative statistics

• Referential statistics

• Inferential statistics

The mean is influenced by:

• The order of data

• Individual scores.

• Outliers

• The standard deviation.

Standard deviation tells you:

• 1. How spread out the data are.

• 1. How many outliers there are.

• 1. what the mean, median and mode are.

• 1. the square root of the mean.

When is median a better choice than mean?

• 1. When the data is normally distributed and has no outliers

• 1. When the data is skewed

• 1. When the standard deviation is very small

• 1. When the data is non-numerical

The interquartile of the data is 20.

• True

• False

Range of the values 1, ,8, 7, 21, 4, 5, 14, 5, 7, 8, 12 is

• 20

• 18

• 5

• 12