Chapter 12 - Data Based and Statistical

Question 1

Measures of central tendency

Answer 1

Provide a single value representation for the middle of a group of data

Question 2

Mean

Answer 2

Measure of central tendency that equally weighs all values; average

Question 3

Median

Answer 3

Value that lies in the middle of the data set

Question 4

Mode

Answer 4

Data point that appears most often

Question 5

Normal distribution

Answer 5

Symmetrical
- Mean, median, and mode are all the same

Question 6

Standard distribution

Answer 6

Normal distribution with a mean of 0 and standard deviation of one

Question 7

Skewed distributions

Answer 7

Have differences in their mean, median, and mode

Question 8

Bimodal distributions

Answer 8

Have multiple peaks

Question 9

Range

Answer 9

Difference between the largest and smallest values in a data set

Question 10

Interquartile range

Answer 10

Difference between the value of the 3rd quartile and 1st quartile

Question 11

Standard deviation

Answer 11

Measurement of variability about the mean

Question 12

Outliers

Answer 12

May be a result of true population variability, measurement error, or non-normal distribution

Question 13

Independent events

Answer 13

Probability of event does not change based on the outcomes of other events

Question 14

Dependent events

Answer 14

Probability of event changes depending on the outcomes of other events

Question 15

Mutually exclusive outcomes

Answer 15

Cannot occur simultaneously

Question 16

Confidence intervals

Answer 16

Range of values about a sample mean that are used to estimate the population mean

Question 17

Pie charts/bar charts

Answer 17

Used to compare categorical data

Question 18

Histograms/box plots

Answer 18

Used to compare numerical data