0 Question 27 v You plan to build a Condence Interval to estimate the mean of a population for which the standard deviation is known to be 11.5. Find the minimum sample size needed to guarantee with 94% probability that your estimate is within Margin of Error 0.8 of the true population mean. Keep at least 4 decimal places in 2c to avoid rounding errors. Enter a whole number. 0 Question 28 v You plan to build a Condence Interval to estimate the mean of a population for which the standard deviation is known to be 11.9. Find the minimum sample size needed to guarantee with 95% probability that your estimate is within Margin of Error 0.9 of the true population mean. Keep at least 4 decimal places in Zc to avoid rounding errors. Enter a whole number. 0 Question 29 v The SAT Exam is designed so that scores are N[1000,1DO}. You are asked to use a Confidence Interval to estimate the population mean SAT score to check that the test is calibrated correctly. Find the minimum sample size needed to guarantee with 90% probability that your estimate is within Margin of Error 10 of the true population mean. Keep at least 4 decimals in Z: to avoid rounding errors. Enter a whole number