Which question is not a good survey question?

a) don’t you agree that the financial crisis is essentially over?

b) on average, how many hours do you sleep per day?

c) what is your opinion of educational funding this year?

d) are you happy with the availability of electronic products in your state?

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.)