Answer Happy

Question 27 4 pts Note: You will answer the next 3 questions using the problem stated below. A local community college instructor believes that, for an introductory English class, the average final grade of evening students is less than the average final grade of traditional day students. A random sample of 300 evening students had an average final grade of 84.5. The population standard deviation for evening students is 11.8. A random sample of 250 traditional day students had an average final grade of 86.2, with a population standard deviation of 10.2. The instructor has set the significance level (a) = .10. For this question: Compute the test zscore. Round your answer to 2 decimals.
Question 28 4 pts A local community college instructor believes that, for an introductory English class, the average final grade of evening students is less than the average final grade of traditional day students. A random sample of 300 evening students had an average final grade of 84.5. The population standard deviation for evening students is 11.8. A random sample of 250 traditional day students had an average final grade of 86.2, with a population standard deviation of 10.2. The instructor has set the significance level (a) = .10. For this question: What is your conclusion for this hypothesis? O We fail to reject the null and cannot conclude the alternative. O We reject the null and conclude the alternative.
Question 29 A local community college instructor believes that, for an introductory English class, the average final grade of evening students is less than the average final grade of traditional day students. A random sample of 300 evening students had an average final grade of 84.5. The population standard deviation for evening students is 11.8. A random sample of 250 traditional day students had an average final grade of 86.2, with a population standard deviation of 10.2. The instructor has set the significance level (a) = .10. For this question: Calculate a 95% confidence interval for the difference in the average final grades between evening and day students. 4 pts Enter the LCL and UCL rounded to 2 decimals places. Be sure to include a negative sign (-) if either response is a negative value. (i.e., -x.xx, or x.xx) LCL UCL