Question 9 (Mandatory) (2 points) What is the value of o (alpha) for a 98% confidence interval? 0.02 0.01 0.20 0.05 Oo.10 Question 10 (Mandatory) (2 points) Which of the following is NOT a property of the t-distribution? It is symmetric. It's shape (spread) is determined by the degrees of freedom. As the sample size grows large, it gradually approaches the normal distribution. It has fatter tails than the normal distribution All of the above are properties of the t distribution. Question 11 (Mandatory) (2 points) Two random samples from the same population have sample sizes of n-35 and n-50. Which of the following is true for a 95% confidence interval? The confidence interval for the sample size n- 50 is narrower. The confidence interval for the sample size n-50 is wider. The sample size of n-35 has a greater degree of confidence. The sample size of n-50 has a greater degree of confidence. ONone of the above. Question 12 (Mandatory) (2 points) When determining the sample size for a mean for a given level of confidence and a given standard deviation, if the max margin of error is allowed to increase, which of the following is true regarding the sample size? The sample size will decrease. The sample size will increase. The sample size will stay the same. The sample size cannot be determined. ONone of the above