And the p value

Listed below are time intervals (min) between eruptions of a geyser. Assume that the "recent" times are within the past few years, the "past" times are from around 20 years ago, and that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Does it appear that the mean time interval has changed? Is the conclusion affected by whether the significance level is 0.10 or 0.01? Recent 79 90 89 78 56 101 61 86 69 87 82 84 55 81 75 103 60 Past 88 87 93 94 63 84 85 92 87 91 88 91 Let u, be the recent times and let uz be the past times. What are the null and alternative hypotheses? 10 11 OA. Ho: H1

H 2 15 16 Calculate the test statistic. 17 18 1= (Round to two decimal places as needed.) 19 Find the P-value. 20 21 Click to select your answer(s). ? 22 23 24 25