Statistics Chapter 2

Question 1

Mode

Answer 1

The value that occurs most often

Question 2

Median

Answer 2

The middle value when data values are put in order (not affected by extreme values)

Question 3

Mean

Answer 3

Sum of data values/ number of data values.
Gives true measure of data but affected by extreme values (outliers).

Question 4

Mean for frequency table

Answer 4

sum of product of data values and frequencies/ sum of frequencies

Question 5

Range

Answer 5

The difference between the largest and smallest values in the data set.

Question 6

Interquartile range

Answer 6

The difference between the upper quartile and lower quartile, Q3 - Q1

Question 7

Interpercentile range

Answer 7

The difference between the values for two given percentiles

Question 8

How are standard deviation and variance linked?

Answer 8

Standard deviation is the square root of variance

Question 9

Common definitions of outliers

Answer 9

Greater than Q3 + k(Q3-Q1)
Less than Q1 - k(Q3-Q1)

Question 10

What is cleaning the data?

Answer 10

Removing anomalies from a data set