Test on Measures of central Tendency

A "normal" distribution is symmetric about the middle

• true

• false

Measures of center are useful because

• they are always correct

• they provide a single value that identifies the center of a distribution

• they show the largest values in a data set

• they help to organize your data

In order to find the median the data has to be

• numerical and put in order from least to greatest

• categorical and put in order from lowest to highest frequency

• numerical and in any order

• categorical and in any order

The ______________ can be found by subtracting the lower extreme from the upper extreme.

• Range

• Median

• Mean

• Rate

How do we find the median when there are exactly TWO numbers in the middle of the data set?

• We add up all of the numbers and divide by the number of numbers.

• Subtract the lower extreme from the upper extreme.

• Add the two numbers together and divide the sum by 2.

• Use the formula I = P x r x t

An OUTLIER in a set of data is a number that is far away from the rest of the numbers.

Identify the OUTLIER in this data set.

5, 8, 10, 11, 15, 53

• 5

• 53

• 0

• 15

The temperature received till Friday was 34, 38, 36, 30 and 31. If the temperature on Saturday drops to 11^oC, how does the inclusion of Saturday's temperature affect the weekly mean temperature?

• increase

• decreases

• does not change

• can not be determined

During Michael Jordan's last 5 years of playing basketball, these were his average scores for points per game:

30.4, 29.6, 28.7, 22.9, 20.0

Find the mean pointsper game for those 5 years.

• 32.9

• 26.32

• 28.7

• 22.32

A data value that occurs most often in a data set is the measure of central tendency called the...

• mean

• median

• (n+1)/2 position

• mode

Mrs. Jones surveyed the class for the number of letters in their given first name. The data is recorded below.
{5, 8, 6, 5, 4, 9, 8, 7, 6, 3, 8, 7, 5, 6, 7, 8}
What is the interquartile range of the data?

• 2
• 3
• 7
• 8

Tags

CCSS.6.SP.B.5

CCSS.6.SP.A.3

CCSS.6.SP.A.2