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STT206

Question: On the menu list of a restaurant, there are 4 vegetables, 3 salads and 2 types of bread. If a customer\n wants one vegetable, one salad and one bread, how many possible choices are there for him?
Answer:  24

Question: For which of the following probability distributions are the mean and variance equal?
Answer:  Poisson

Question: The mathematical formula or rule used for estimating the parameter is called
Answer:  Estimator

Question: If the occurrence of an event does not influence the occurrence of another event, the two \nevents are said to be
Answer:  Independent

Question: The fraction or ratio of a sample possessing a certain trait is called a
Answer:  Proportion

Question: Which of the following is used to measure the degree of asymmetry of a distribution?
Answer:  Skewness

Question: The number of bank robberies that occur in Lagos is modeled to be Poisson distributed with \nmean of 1.8 per day. Find the probability of getting exactly three robberies in a day.
Answer:  0.1607

Question: Data that are sourced directly from the field of enquiries by the user himself are called
Answer:  Primary\nData

Question: A random or unbiased assignment of individuals or items to treatment groups in order to average \nout extraneous (or nuisance) factor is called
Answer:  Randomization

Question: All the following are approaches to assigning probability to events except
Answer:  Objective

Question: Twenty raffle tickets numbered 1 to 20 and one is drawn at random. What is the probability that the \nnumber shown on the ticket is an odd number or a prime numbr?
Answer:  0.55




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