Question 7: If a normal distribution has a mean of 10 and standard deviation of 1, then what proportion of the distribution of means falls between 9 and 11 when sample size is 2? (1 Points) Question 8: A sample of 395 scores was drawn from a normal distribution with a mean of -1000 and a standard deviation of 19.72. What was the sample mean if exactly 88.88% of the distribution of means falls (1 Points) below it? Question 9: If Za/2 = 2.3125, determine the proportion of (1-a)100% confidence intervals that will not capture u when the confidence intervals are computed as m + za/2(Om)? (1 Points) W X