Introduction to Statistics Name Quiz Assignment 23 Tests of significance 1 In the following settings what is the null hypothesis what is the alternative hypothesis a Does smoking cigarettes increase the likelihood of getting lung cancer Statistics Quiz 23 H0 Ha Ha b Does one s body weight influence one s judgment of a person s physical attractiveness H0 2 Identify whether the following settings are associated with a one tailed or a two tailed test of significance a Does taking a weight lifting course increase muscular strength one tailed two tailed b Does getting married have an impact on one s life satisfaction one tailed two tailed c Does practice increase my likelihood of a successful performance one tailed two tailed 3 Are the following results statistically significant Use p 05 as the criteria a The correlation between and IQ and GPA is 47 r 47 p 001 Significant Yes no Accept H0 Accept Ha p 001 means that out of 1000 trials time s the result is a chance finding time s the result is valid b Men M 4 82 score higher than women M 4 71 on emotional stability t 1 34 p 105 Significant Yes no Accept H0 Accept Ha p 105 means that out of 1000 trials time s the result is a chance finding time s the result is valid Extra Complete the sentence without looking The p value identifies the likelihood t p o o b c single letter