Statistics Terms and Formulae

48 terms by mwltruffaut

Create a new folder

Advertisement Upgrade to remove ads

Use the "Show Symbols" check box to view symbols needed to answer some questions.

upper-case sigma

What is the name of the "Σ" symbol?

population

"N" stands for the number of scores in a _____ .

sample

"n" stands for the number of scores in a _____.

population mean

"μ" is the symbol for the _____.

population standard deviation

"σ" is the symbol for the _____.

mu

What is the name of the "μ" symbol?

lower-case sigma

What is the name of the "σ" symbol?

raw score

"X" is a symbol meaning _____.

sample mean

"M" is a symbol for the _____.

Sum of Squared deviations

"SS" stands for _____.

ΣX, N

Fill in the blanks for population.

N

population variance = SS/___

N

σ = √(SS/___)

sample standard deviation

"s" stands for for the _____.

ΣX, n

Fill in the blanks for sample.

Degrees of freedom

_____ refers to the number of scores in a sample that are free to vary with no restriction.

1

Complete the formula: df = n - ___

mean

Variance is the _____ squared deviation.

sample variance

"s²" stands for _____.

n-1

s² is the same as SS/___

N

σ² is the same as SS/___

n-1

Complete this formula for the sample standard deviation.

z

Complete the formula: X = μ + ___σ

µ

Complete the formula.

s

Complete the formula: X = M + z___

standard error

This formula yields the _____.

30

The distribution of sample means is almost perfectly normal if (1) the population from the which the samples are selected is a normal distribution and (2) the number of scores in each sample is relatively large, around ___ or more.

M

Complete the formula.

alpha level

The ____ for a hypothesis is the probability that the test will lead to a Type I error.

Type I

A ___ error occurs when a researcher fails to reject the alternative hypothesis.

Type II

A ___ error occurs when a researcher fails to reject the null hypothesis.

power, power

The ___ of a statistical test is the probability that the test will correctly reject a false null hypothesis. That is, ___ is the probability that the test will identify a treatment effect if one really exists.

β

The power of a hypothesis test is equal to 1 - ___.

t-score

What will this formula yield?

abscissa

The horizontal line on a frequency distribution table is called the _____.

ordinate

The vertical line on a frequency distribution table is called the _____.

computational

This is the _____ formula.

sample mean

This symbol stands for the _____.

the standard deviation

What will this formula yield?

sample mean

This formula will allow you to locate a _____.

sample standard deviation

This formula yields _____.

sample variance

This formula yields _____.

estimated standard error

This formula yields _____.

larger

The larger the variance, the _____ (smaller / larger) the error.

computational formula for SS

What is this?

Cohen's d

This is the formula for _____.

This is the _____ formula.

increases

Increasing the sample size _____ (decreases / increases) the likelihood of rejecting the null hypothesis.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set