Main content
Course: Statistics and probability?>?Unit 14
Lesson 1: Chi-square goodness-of-fit tests- Chi-square distribution introduction
- Pearson's chi square test (goodness of fit)
- Chi-square statistic for hypothesis testing
- Chi-square goodness-of-fit example
- Expected counts in a goodness-of-fit test
- Conditions for a goodness-of-fit test
- Test statistic and P-value in a goodness-of-fit test
- Conclusions in a goodness-of-fit test
? 2024 Khan AcademyTerms of usePrivacy PolicyCookie Notice
Expected counts in a goodness-of-fit test
You might need: Calculator
Problem
A bakery sells cakes, cookies, and pastries. They wonder if customers are equally likely to buy each product. They take a sample of recent purchases and record what was purchased (they are willing to treat this as a random sample). Here are the results:
Product | Cakes | Cookies | Pastries |
---|---|---|---|
Observed purchases |
They want to perform a goodness-of-fit test to determine if these results suggest that one type of product is more popular than the others.
What is the expected count of cake purchases?
You may round your answer to the nearest hundredth.
You may round your answer to the nearest hundredth.
Expected: