In: Statistics and Probability
Research Scenario: People can be classified into two categories: Type A personalities (hard-driving, competitive, and ambitious) and Type B personalities (relaxed and easy-going). Type A personalities also experience chronically high levels of frustration. To demonstrate this phenomenon, separate samples of Type A’s and Type B’s are obtained, with n=10 in each sample. They complete a frustration inventory measuring their level of frustration. The average score for the Type A’s is 82 with standard deviation of 11.9. The average score for the Type B’s is 71 with standard deviation of 10.2.
7. State your decision about the null in three ways (using the critical value, using the p-value, and using the CI) and write your statistical conclusions in full sentences (Step 4