What might you conclude if a random sample of 22 time intervals between eruptions has a mean longer than 87 minutes? select all that apply. a. the population mean must be less than 76, since the probability is so low. b. the population mean is 76, and this is just a rare sampling. c. the population mean may be greater than 76. d. the population mean may be less than 76. e. the population mean is 76, and this is an example of a typical sampling result. f. the population mean must be more than 76, since the probability is so low. g. the population mean cannot be 76, since the probability is so low.