Questions separated by topic from statistics 1 maths alevel past papers. A probability distribution for a discrete random variable lists all the possible outcomes for the random variable together with the related probability 3. These formulas for variance and standard deviation only work for a binomial distribution. In a binomial distribution the probabilities of interest are those of receiving a certain number of successes, r, in n independent trials each having only two possible outcomes and the same probability, p, of success. New york city typically has rain on about 16% of days in october.
What is the probability that the player makes exactly three out of six free throws. What is a probability distribution for a discrete random variable. What is the probability that it will rain on exactly 5 days in october. For questions 3 to 6 use the following information. Binomial and geometric distributions terms and formulas. Which of the following is not a property of a binomial experiment. The probability of success may change from trial to. When might a researcher use the normal distribution to approximate binomial probabilities. Draw the binomial distributions for the following cases and say whether. Binomial distribution multiple choice identify the letter of the choice that best completes the statement or answers the question. Binomial probability practice worksheets answers included.
The number of rainy days, xcan be represented by a binomial distribution with. Questions like given the number of trials and the probability of. About 10% of all adults deliberately do a onetime fling and feel no guilt about it. Multiple choice questions, word problems with answers. So, for example, using a binomial distribution, we can determine the probability of getting 4 heads in 10 coin tosses.
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