Score: 0/ Zo 1/42 answered Question 2 Select the correct statement: When building a CI for a population mean, '33:? if building a Z-interval, you always need a sample size of at Least 30 '3' if the population is not known to be normally distributed, you need a sample size of at least thirty C' if building a T-lnteryal, you always need n For a given level of Confidence, C, the Critical Value Tc will get closer to Zc as the Degrees of Freedom increase. This is because: '33:? T is used when using 3 to estimate cr, and the larger the sample size, the more accurate 3 gets as an estimate for J '33:? 0' gets smaller as the sample size increases '3' the population changes as the sample size increases '3' 3 gets smaller as the sample size increases 0 Question 5 v Two biologists are trying to estimate the population mean length of trout in a stream. They each build a Cl based on their own sample data, and the sample sizes were the same. Here are their T-intervals: First biologist: 95% Cl is: 8.5 a: ,u