Question 28 of 50 : Select the besi' answer for the question. 28. A continuous probability distribution where its probability density function is bell-shaped and determined by its mean u and standard deviation 0 is called 0 A. binomial probability distribution. 0 B. normal probability distribution. 0 C. Poisson probability distribution. 0 D. variance distribution Question 38 of 50 : Select the besi' answer for the question. 38. From an infinite population, what type of sample is selected if the following conditionals are satisfied? - Each element selected comes from the same population. - Each element is selected independently. O A. Finite sample 0 B. Simple sample 0 C. Conditional sample 0 D. Random sample Question 48 of 50 : Select the best answer for the question. 48. Which equation represents the sample mean