Suppose a geyser has a mean time between eruptions of 65 minutes. If the interval of time between the eruptions is normally distributed with standard deviation 26 minutes, answer the following question Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) What is the probability that a randomly selected time interval between eruptions is longer than 77 minutes? The probability that a randomly selected time interval is longer than 77 minutes is approximately (Round to four decimal places as needed.) (b) What is the probability that a random sample of 12 time intervals between eruptions has a mean longer than 77 minutes? The probability that the mean of a random sample of 12 time intervals is more than 77 minutes is approximately (Round to four decimal places as needed.) (c) What is the probability that a random sample of 23 time intervals between eruptions has a mean longer than 77 minutes? The probability that the mean of a random sample of 23 time intervals is more than 77 minutes is approximately (Round to four decimal places as needed ) (d) What effect does increasing the sample size have on the probability? Provide an explanation for this result. Choose the correct answer below O A. The probability decreases because the variability in the sample mean increases as the sample size increases. O B. The probability increases because the variability in the sample mean increases as the sample size increases. O C. The probability increases because the variability in the sample mean decreases as the sample size increases. O D. The probability decreases because the variability in the sample mean decreases as the sample size increases, (e) What might you conclude if a random sample of 23 time intervals between eruptions has a mean longer than 77 minutes? Choose the best answer below