A random sample of 38 statistics students from a large statistics class reveals an r of 2 .24 between their test scores on a statistics exam and the time they spent taking the exam. Test the null hypothesis with t, using the .01 level of significance.
Answer to relevant QuestionsIndicate whether each of the following studies is an experiment or an observational study. If it is an experiment, identify the independent variable and note any possible confounding variables. (a) A psychologist uses ...In Table 7.4 on page 173, all ten top hitters in the major league baseball in 2011 had lower batting averages in 2012, supporting regression toward the mean. Treating averages as whole numbers (without decimal points) and ...The F test describes the ratio of two sources of variability: that for subjects treated differently and that for subjects treated similarly. Is there any sense in which the t test for two independent groups can be viewed ...Each of the following (incomplete) ANOVA tables represents some experiment. Determine the number of levels for each factor; the total number of groups; and, on the assumption that all groups have equal numbers of subjects, ...Use H rather than F to test the weight change data recorded in Review Question 16.13 on page 381.
Post your question