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6. A company produces mosquito repellents that has an average of 300 hours with standard deviation of 30 hours period of effectiveness. A sample of 40 repellents was taken and found out that the average period of effectiveness was 290 hours. At level of significance of 0.05, test if there is enough evidence to claim that the period of effectives of all repellents are the same. Instructions: Follow the 7 Steps in Hypothesis Testing. Use four (4) decimal places in the computation and use two (2) decimal places to present the final answer of your computed value. 20 Points: 4 - Step 1 4 - Step 2 2 - Step 3 5 - Step 4 2 - Step 6 3 - Step 7