4.11 Hypothesis testing: chi-squared and t-tests

4.11 Hypothesis testing: chi-squared and t-tests Quiz

IB Maths: Applications and Interpretation HL: Quiz

Studying this course? Keep your progress in one place.

Pick an answer for each. Quizzes never use energy.

5 questions, one answer each

Each answer is checked as you go, with why.

See all 5 questions

  1. 1. A contingency table has 33 rows and 44 columns. How many degrees of freedom?

    • A. 1212
    • B. 66
    • C. 77
    • D. 55

  2. 2. A row total is 6060, a column total is 4040 and the grand total is 200200. What is the expected frequency of that cell?

    • A. 1212
    • B. 2020
    • C. 0.120.12
    • D. 3030

  3. 3. p=0.03p=0.03 for a test. Which conclusion is correct?

    • A. Do not reject H0H_0 at 5%5\% or 1%1\%
    • B. Reject H0H_0 at 1%1\% but not 5%5\%
    • C. Reject H0H_0 at 1%1\% and 5%5\%
    • D. Reject H0H_0 at 5%5\% but not at 1%1\%

  4. 4. A goodness of fit test has 55 categories. How many degrees of freedom does it have at SL?

    • A. 55
    • B. 66
    • C. 44
    • D. 33

  5. 5. Which condition is needed for the pooled two-sample tt-test?

    • A. The samples must be paired
    • B. The sample sizes must be equal
    • C. Both populations are normal with equal variances
    • D. The population variances must be known

Quiz