AP® Biology: Chi Square Test Quiz

What is the primary purpose of the Chi Square test in AP® Biology?

• To calculate the average of a data set

• To determine if observed data significantly differs from expected data

• To predict future biological outcomes

• To memorize biological terms

Tags

NGSS.HS-LS2-2

What does the null hypothesis state in a scientific experiment?

• The dependent variable is not influenced by the independent variable

• The experiment will always yield the same results

• The independent variable affects the dependent variable

• The results are always due to chance

What does the symbol '∑' represent in the Chi Square equation?

• Difference

• Sum

• Division

• Product

What is the degree of freedom in the coin flip experiment?

• 1

• 3

• 2

• 0

What does a Chi Square value greater than the critical value indicate?

• The null hypothesis is accepted

• The null hypothesis is rejected

• The experiment is invalid

• The data is inconclusive

What is the significance of a .05 critical value in the Chi Square test?

• There is a 50% chance the results are due to chance

• There is no chance the results are due to chance

• There is a 95% chance the results are due to chance

• There is a 5% chance the results are due to chance

Which significance level

(column) do you look at when finding the critical value on a chi square chart in AP Bio?

• .50

• .10

• .05

• .001

What symbol is used to represent chi-square?

• X²

• n

• Ψ

• P

Observed in the wild are 10 circles, 20 squares and 30 triangles. The ratio for this particular population is 2:3:5 
observed: 10 circles     expected: 12
observed 20 squares    expected : 18
observed 30 triangles   expected: 30
What is the X² of this problem?

• .22
• .33
• .44
• .55

Tags

NGSS.HS-LS4-3

What is the

χ² _calculated value for the following situation.

• 6.65

• 6.66

• 0.00991

• 1