You want to construct a confidence interval for the mean number of taste buds in top chefs. Assume the population standard deviation is750.

a) Calculate the minimum required sample size if you want a margin of error no greater than 150 at the 99% confidence level. Enter your answer as a whole number.

The minimum sample size is [a] chefs.

b) What will cause the minimum required sample size to increase? Select all that apply, seperate by a coma. [b]

1. decreasing the confidence level
2. increasing the acceptable margin of error
3. increasing the confidence level
4. decreasing the acceptable margin of error