6. The table below contains data on sugar (gms/serving) in samples of cereal geared toward children. Assuming the population is known to be normally distributed, find mean amount of sugar in children's cereal using the 95% confidence level.

10 14 12 9 13 13 13 11 12 15 9 10 11 17 6 12 15 12 12

a. Check assumptions.

b. Find sample statistic and confidence interval.

c. Statistical interpretation.

d. What would you say in response to this question if the population is not known to be normally distributed and the population standard deviation is unknown?