Elementary Statistics Formula Sheet

This formula sheet contains the formulas (and the purpose for using each formula) for the most common confidence intervals and hypothesis tests in Elementary Statistics.

The sheet contains formulas for the following:

• Confidence Interval for a Mean
• Confidence Interval for a Difference in Means
• Confidence Interval for a Proportion
• Confidence Interval for a Difference in Proportions
• One sample t-test
• Two sample t-test
• Welch's t-test
• Paired samples t-test
• One proportion z-test
• Two proportion z-test
• Chi-Square Goodness of Fit Test
• Chi-Square Test of Independence