Answer to Question #76861 in Statistics and Probability for SHEHZAAD

Question

4.1. A discrete random variable can be described by the binomial distribution if it satisfies four conditions. State
these FOUR (4) conditions. (4 marks)
4.2. The pass rate for a Statistics test in a class of MBA students is 65%. If five students are randomly selected from
the class, determine the probability that at least two passed the test. (7 marks)
4.3. Explain why the areas for only positive z-values are given on a standard normal distribution table. (2 marks)
4.4. The weight of a packet of imported biscuits from a shipment is normally distributed with a mean of 500 g and a
standard deviation of 40 g. What percentage of packets of the shipment weighs between 540 g and 560 g?
(5 marks)