Questions 15 refer to the sample data in the following table (based on data from the Bureau of Labor Statistics). The table lists frequencies for randomly selected nonfatal occupation injuries arranged according to day of the week. Assume that we want to use a 0.05 significance level to test the claim that such injuries occur with equal frequency on different days of the week. Day Mon Tues Wed Thurs Fri Number 23 23 21 21 19 What are the null and alternative hypotheses corresponding to the stated claim?
Discrete Probability Distributions • Bernoulli Distribution: a discrete data distribution used to describe a population of binary variable values; when n=1 o n refers to the number of trials • Binomial Distribution: repeating an experiment more than one time (n>1) o Success: x=1 o Failure: x=0 • Binary: one of only two outcomes can occur, listed as 0 or 1 • Discrete: these distributions are discrete because there are no values in between 0 and 1 • P(0) = 1- π; P(1) = π o Total of these probabilities must equal to one (1-π + π will equal 1) o P or π will be used to denote probability o X is a count of the number of successes • The mean of a Bernoulli distribution will have be π, or the probability of s
