Samples of 10 seats of each type (A, B, C) were selected and given the safety test. The scores are given below. Is one seat safer than another or are they all about equal in terms of safety?
A. Write a statistical null and alternate hypothesis.
B. Test the null hypothesis at the 0.05 level of significance. Is the null rejected? Make a decision (Reject or Fail to Reject the Null). Justify your decision.
C. Draw a conclusion about the relative safety of the three types of seats.
Safety Test Scores
Type A: 7.6, 8.1, 8.2, 6.4, 7.7, 9.0, 5.3, 6.8, 5.4, 8.8
Type B: 8.1, 7.5, 6.8, 7.3, 6.6, 5.4, 8.3, 7.2, 6.9, 6.4
Type C: 7.3, 9.2, 8.8, 7.8, 6.9, 9.2, 9.0, 8.9, 7.9, 9.1