Determine whether the results appear to have statistical significance, and also determine whether the results appear to have practical significance. In a study of a birth sex selection method used to increase the likelihood of a baby being born female, 1915 users of the method gave birth to 941 males and 974 females. There is about a 23% chance of getting that many babies born female if the method had no effect. Because there is a 23% chance of getting that many babies born female by chance, the method V couples would likely use a procedure that raises the likelihood of a baby born female from the approximately 50% rate expected by chance to the % produced by this method. (Round to the nearest integer as needed.) So this method

orary > MAT 240: Applied Statistics home > Hypothesis tests for the difference between two population means EzyBooks catalog An online math tutor service would like to claim that the average time spent taking a standardized test after students go through tutoring is less than the average time spent before going through tutoring. A simple random sample of students takes a pre-test, then goes through tutoring and takes a post-test. Results of the sample are shown below. Before After 126.448 125.203 What are the population parameters? Mean Variance Observations Pick Pearson Correlation 0.521 Hypothesized Mean Difference Is the two-sample hypothesis test a paired t-test or an unpaired t-test? df t Stat PIT