Questions 610 refer to the sample data in the following table (based on data from the Pew Research Center). Randomly selected subjects were asked about the use of marijuana for medical purposes. Assume that we want to use a 0.05 significance level to test the claim that response to the question is independent of gender. In Favor Oppose Don't Know Men 538 167 29 Women 557 186 33 Is the hypothesis test lefttailed, righttailed, or twotailed?
Week 8: Normal Distribution 25 October 2016 Basic Statistics for Research Professor HK Dong Wendy Liu Probability density function f(x) – describes the distribution of probability for the continuous random variable. It has the properties The total area under the probability density curve is 1 area under the probability density curve between a and b for all x Normal distribution – bell-shaped density curve Mean = µ Standard deviation = σ Normal distribution w/ mean of µ and st. dev of σ is denoted by N(µ, σ) Standard normal distribution: N(0,1) Groundwork for Inferential Statistics Sampling distribution of a statistic o distribution of all possible observations of the statistic for samples of
