5.3 no 2

Question 1

What are the two types of hypotheses?

Answer 1

• Null Hypothesis (H0) - States there is no relationship or no difference between two groups of data in an investigation
• Alternative Hypothesis (Ha) - One of many possible hypotheses that states observed results are due to a nonrandom cause

Question 2

What is the chi-square goodness-of-fit test used for, and how is it done?

Answer 2

Used to determine if there is a significant relationship between two groups of data
Observed outcomes are compared to expected outcomes to see if variations could be due to chance
Often for genetic crosses

Question 3

What are the steps to perform a chi-square goodness-of-fit test

Answer 3

• Steps to perform a chi-square goodness-of-fit test
  1. Establish the research question.
  2. Determine the null hypothesis.
  3. Determine the alternative hypotheses.
  4. Count observed values.
  5. Determine expected values.
  6. Calculate the chi-square value.
  7. Calculate the degrees of freedom.
  8. Select the p value.
  9. Identify the critical value.
  10. Compare the chi-square value to the critical value to draw conclusions

Question 4

If the chi-square value is less than the critical value…

Answer 4

fail to reject the null hypothesis

accept the null

Question 5

If the chi-square value is greater than the critical value…

Answer 5

reject the null hypotheses