D Question 11 1 pts According to the Central Limit Theorem, what minimum sample size is required in order to assume that the sampling distribution of the sample mean, x , is approximately normal? D Question 12 1 pts Which of the following is not a characteristic of the t-distribution? O There are n - 1 degrees of freedom, where n is the sample size The tails are thinner than the normal distribution curve O The larger the degrees of freedom, the closer the t-distribution curve resembles the normal distribution curve The t-distribution is primarily used when the population standard deviation is unknown