Process: Hypothesis Tests

  1. Read the problem to determine if it involves a claim about a proportion, mean or standard deviation.
  2. List all variables using proper math notation.
  3. Translate the ORIGINAL claim into NULL/ALTERNATE hypotheses
  4. Look up critical statistics (z, t, or χ2) and locate the critical region.
  5. Use the correct formula to calculate test statistics (z, t, or χ2) Determine whether to REJECT or FAIL-TO-REJECT the null hypothesis
  6. Word the conclusion about the ORIGINAL claim according to Figure 8-7 on page 377 

Process: Confidence Intervals

  1. Identify the population parameter you are estimating. (a mean, a standard deviation, or a proportion)
  2. Identify the Confidence Interval/Margin of Error formulas you will use.
  3. Identify the variables you need to compute the margin of error
  4. Look up the value of critical z or critical t or critical chi squared Leftorcritical chi squared Right you need based on the confidence level and the formulas you are using.
  5. Compute the Margin of Error and Confidence Interval.
  6. State in words the answer to the question regarding interpretation of results.