Using the sample size calculator at statulator.com calculate the nal required sample size ensuring a +/- 2% margin of error with 95%. Note that the population of interest is N = 27000 and the expected response rate is 20%. Mike is estimating the sample size required for his study on the average amount that undergraduate students spend per semester on textbooks. A previous pilot test with a convenience sample suggests that students spend approximately $525 with a standard deviation of $25. Using the sample size calculator at statulator.com calculate the nal required sample size ensuring a +/- 3% margin of error with 99%. Note that the population of interest is N = 16000 and the expected response rate is 40%. Jane is estimating the sample size required to study how effective this years management and organization committee was during the 2021 U17 soccer season. The variable "effectiveness" was measured with a Yes and No response. Last year 78% said the committee was effective