1. A confidence interval is computed from a sample selected from a population. Based on the concept of confidence interval, please answer questions 1-2. There are two simple random samples selected separately from two different populations. The population with low variability will produce estimates with large margins of error assuming two samples have same sample size. a Fals b True 4.52 points QUESTION 2 There are two simple random samples selected from the same population. The sample with small sample sizes will tend to have large margins of error. a True b Fals e 4.34 points QUESTION 3 1. The mean of a simple random sample selected from a population is used to estimate the population mean. Based on statistical inference, please answer questions 3 - 5. The mean from a sample of 9 is 10 with sample standard deviation 3, Ho : H = 8 This sample is used to test the hypothesis: Ia : / - 8 Given that the critical value of the t-statistic with 8 degree freedom and Ck-level of 0.05 is 2.306, the null hypothesis is a Rejected O b Retained O c Can not be determined