1-Proportion Hypothesis Tests Student Study Session 8. A new window is being advertised to withstand hurricane force winds in excess of 155 miles per hour at a rate of 85% success. In an experiment on these windows, a random sample of 200 of these windows were placed in a wind tunnel and exposed to winds exceeding 155 miles per hour. After the test, 34 of the windows had broken due to the pressure from the wind speed. A test of hypothesis was conducted on the following hypothesis. H0 : The success rate of the new style of window is 85%. Ha : The success rate of the new style of window is less than 85%. The test resulted in a p-value of 0.2141. (a) Interpret the p-value in context of this study. (b) Based on this p-value, what conclusion should be drawn in the context of the study? Use a signicance level of a = 0.05. (c) Based on your conclusion in part (b) which type of error, Type I or Type II, could have been made? What is one potential consequence of this error