Assume the age of night school students is normally distributed. a simple random sample of 24 night school students had an average age of 27.3 years. use this information and a sample standard deviation of 5.6 to find 90% confidence interval estimate for the population variance

Asix-sided die of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, 5 times, and 7 times. the experimental probability of rolling a 3 is 10 %, which is approximately % more than its theoretical probability. (round off your answers to the nearest integer.)