Are the requirements all satisfied? a. yes. a normal quantile plot suggests that the sample is from a normally distributed population, and there is enough information to determine that the sample is a simple random sample. b. no. the sample size is not greater than 30, the sample does not appear to be from a normally distributed population, and there is not enough information given to determine whether the sample is a simple random sample. c. no. the conditions for a binomial distribution are not satisfied, and there is not enough information given to determine whether the sample is a simple random sample. d. yes. a normal quantile plot suggests that the sample is from a normally distributed population, and there are observations above and below 75 sec. e. yes. the conditions for a binomial distribution are satisfied, and there is enough information to determine that the sample is a simple random sample.