Question 1) Determine the minimum sample size required when you want to be 95% confident that the sample mean is within one unit of the population mean and o = 18.4. Assume the population is normall distributed. A 95% confidence level requires a sample size of]. (Round up to the nearest whole number as needed.) Question 2) If all other quantities remain the same, how does the indicated change affect the minimum sample size requirement? (a) Increase in the level of confidence (b) Increase in the error tolerance (c) Increase in the population standard deviation (a) How does an increase in the level of confidence affect the minimum sample size requirement? Choose the correct answer below. An increase in the level of confidence the minimum sample size required. (b) How does an increase in the error tolerance affect the minimum sample size requirement? Choose the correct answer below. An increase in the error tolerance the minimum sample size required. (c) How does an increase in the population standard deviation affect the minimum sample size requirement? Choose the correct answer below. An increase in the population standard deviation the minimum sample size required