Chi Squared Flashcards

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1
Q

When do you use chi-squared?

A

used to investigate differences when frequencies (counting) is involved

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2
Q

What can chi-squared used to determine?

A

whether there is a significant difference between expected and observed frequencies

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3
Q

How do you work out the degrees of freedom?

A

number of categories - 1

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4
Q

What do you do after you have calculated the chi-squared value?

A

compare it to critical values,

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5
Q

What does O stand for?

A

Observed

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6
Q

What does E stand for?

A

Expected

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7
Q

How do you work out expected frequency?

A

use ratio from Punnett square and total number of observed

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8
Q

Explain why you might choose to use chi squared?

A

categorical data
showing observed and expected

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