Basics

Question 1

What is the dependent variable

Answer 1

The outcome variable or result of experimentation (y)

Question 2

What is the independent variable

Answer 2

The variable which is measured or controlled by the researcher (x)

Question 3

What is the continuous variable

Answer 3

data with an infinite number of potential values. ex. Temperature…98 vs 98.8 vs 98.865

Question 4

What is probability

Answer 4

the likelihood that something will occur

Question 5

What is a statistic

Answer 5

an estimate generated from a sample

Question 6

What is a parameter

Answer 6

the measured characteristic of a population

Question 7

What is a quantitative measurement

Answer 7

A numerical measurement

Question 8

What is a qualitative measurement

Answer 8

A descriptive or characterization measurement

Question 9

What is a categorical or discrete variable

Answer 9

A measurement that is restricted to a specific value (exclusive) which does not have fractional or in-between values and is usually qualitative.

Question 10

What is nominal data

Answer 10

Data which indicates a difference between the two answers where only one answer may be selected (ex. Named data, selection of male or female)

Question 11

What is ordinal data

Answer 11

Rank ordered data only one of which may be selected (ex. high, medium, or low confidence/feeling)

Question 12

What is interval data

Answer 12

Exclusive and rank-ordered data which has numerically equal intervals. (ex. Fahrenheit temperature)

Question 13

What is ratio data

Answer 13

exclusive and rank-ordered with equal intervals and a point at which the variable is absent (ex. blood pressure, which can be absent indicating a need for CPR!) The highest level of measurement.

Question 14

What is frequency distribution

Answer 14

a gathering of the responses collected from a sample of variables into a table showing the occurrence of each response

Question 15

What is relative frequency

Answer 15

the number of times an observation occurs divided by the total number of observations ex patients that stayed in the hospital 3 days = 7 Total number of patients studied = 50 7/50 * 100= relative frequency of 14%

Question 16

What is cumulative frequency

Answer 16

a list of the number of observations with a value less than the maximum value

Question 17

What is cumulative relative frequency

Answer 17

a cumulative frequency and converted to a percentage. of the total number of observations.

Question 18

What is grouped frequency

Answer 18

a frequency distribution with distinct intervals or groups created to simplify data.

Question 19

What is cumulative percentage

Answer 19

the percentage of observations with a value less than the maximum value of the variable interval (cumulative frequency presented as a percentage of the whole)

Question 20

What is a percentile

Answer 20

the division of a dataset into 100 equal parts

Question 21

What is a quartile

Answer 21

the division of a dataset into four equal parts

Question 22

The formula for calculating percentiles in an ordered data set

Answer 22

P^th_obs = (n + 1) x y/100

P^th_obs = the number of observations at the percentile for which you are looking

n = the number of observations in your data set

y = the percentile your looking at.