Stats Group Reci

Alternative Hypothesis

opposing theory to the null hypothesis

Variance

the spread between the numbers in a data set

Average

expresses central or typical value in a set of data by having their sum of values and dividing them.

Bell Curve

graph depicting the normal distribution, has a shape of a bell and symmetrical both sides

Confidence Interval

refers to the probability that a population parameter will fall between set of values for a proportion of time

Dependent Variable

depend on other factors

Independent Variable

variable that stands alone

Frequency Distribution

graph or table that displays number of observation within given interval

Null Hypothesis

proposes that no statistical significance exists in a set of given observation

Hypothesis Tests

a testing form of statistical inference that uses data from a sample to draw conclusions about the population parameter

Median

middle number in an arranged list of numbers

Mode

number which occurs the most in a set of data

Statistics

science of collecting and analyzing numerical data

Probability

concerning events and numerical descriptions of how likely they are to occur

Normal Distribution

a probability distribution that is symmetric about the mean showing that data near the mean are ore frequent in occurrence

Parameter

fixed limit that establishes how something should be done

Pearson Correlation

is when you have 2 quantitative variables and you wish to see if there is a linear relationship between them

Population

entire group on which data is being gathered and analyzed

Random Variable

a quantity having a numerical value for each member of a group, especially one whose values occur according to a frequency distribution

Regression

is a statistical technique that relates dependent variables to one or more independent variables

Range

it is the difference between highest to lowest observation in a data

Standard Deviation

a measure of how dispersed the data is in relation to the mean

Z - Test

a statistical test for sample size larger than 30, used to test null hypothesis

T - Test

a statistical test that is used to compare the means of two groups

Standard Error of Mean

measures how much dispersing is likely in a sample’s mean compared with the population mean