Question 18 (2 points) Which distribution is more appropriate for estimating the number of earthquakes in California in 2015? Binomial distribution Normal distribution Poisson distribution Question 19 (2 points) Which distribution is more appropriate for analyzing serum cholesterol levels? Binomial distribution Normal distribution Poisson distribution Question 20 (2 points) For the population mean, a 95% Confidence interval (CI) constructed based on the sample mean using a t distribution is always wider than a 95% Cl using a normal distribution. True False