Questions 4, 5 and 6 please

4. Testosterone levels in males assigned at birth are normally distributed with a mean of 679 ng/dL. If we take a random sample of 10 males assigned at birth, what is the probability that the sample mean will be at least 600 ng/dL with a sample standard deviation of 135 ng/dL? 1 = 679 2 = X -M = 600-679 = - 1:85 0.05 6= 135 0.10 135 C . 0.90 x