Statistics

Question 0

Error bars

Answer 0

A graphical representation of the variability of data

Question 1

Standard Deviation

Answer 1

Used to summarize the spread if values around the mean

Question 2

How many values fall within one standard deviation of the mean?

Answer 2

68%

Question 3

How is standard deviation useful?

Answer 3

For comparing the means and the spread of data between two or more samples

Question 4

Qualitative data

Answer 4

Non-numerical

Ex. Sex, color, shape

Question 5

Ranked data

Answer 5

Can be put on a scale that represents an order

Ex. Abundance - very-common-rare

Question 6

Qualitative data

Answer 6

Can be measured

Question 7

Three types of data

Answer 7

Qualitative
Ranked
Quantitative

Question 8

When is quantitative data used

Answer 8

For experiments

Question 9

Two types of quantitive data

Answer 9

Continuous

Discontinuous

Question 10

Continuous data

Answer 10

Can take any numerical value

Ex. Height, weight, number

Question 11

Discontinuous data

Answer 11

Only take specific values

Ex. Shoe sizes

Question 12

What is the purpose of statistics?

Answer 12

Allows you to see the distribution of data

Question 13

Features of distribution of data

Answer 13

Central tendency

Spread

Question 14

Null hypothesis

Answer 14

(Ho) - no significant difference between the growth of the two groups

Question 15

Mean

Answer 15

A simple measure of the central tendency of the data

Question 16

Median

Answer 16

Middle value when data is arranged in number oval order

Question 17

Mode

Answer 17

Most common value

Question 18

Range

Answer 18

Difference between the smallest and largest data value

Question 19

Descriptive stats

Answer 19

Mean
Median
Mode
Range

Question 20

Important things for graphing:

Answer 20

• Descriptive title
• Uncertainties included
• Consistent number of decimal points

Question 21

Types of distribution:

Answer 21

Normal distribution
Skewed distribution
Biomodal distribution

Question 22

Normal distribution

Answer 22

Data spread symmetrically about the MEAN and MEDIAN

Question 23

Skewed distribution

Answer 23

A good measure of central tendency in MEDIAN

Question 24

bio modal distribution

Answer 24

We use MODE to identify the tendency in data

Question 25

Standard deviation

Answer 25

- A measure of variation - Used to summarize the spread of values around the mean - presented in the form: x (+/-) s

Question 26

What percentage of data lie within 2s of the mean?

Answer 26

95%

Question 27

s

Answer 27

Standard deviation

Question 28

How is a lower range of numbers useful in relation to s?

Answer 28

A small s indicated that the data is clustered closely around the mean value

Question 29

How is more range of numbers useful in relation to s?

Answer 29

A large s indicated a wider spread around the mean

Question 30

Significantly different s

Answer 30

No overlap between s of the two means

Question 31

What are inferential stats based on?

Answer 31

Samples

Question 32

What are inferential stats used for?

Answer 32

To estimate population parameters which allows us to make conclusions about the studies aspect of the population