d. Do the data show that the mean score for those with computer experience was significantly less than the mean score for those without computer experience? Us a=0.05. (i) State the null and...

Extracted text: d. Do the data show that the mean score for those with computer experience was significantly less than the mean score for those without computer experience? Us a=0.05. (i) State the null and alternative hypotheses, (ii) Calculate the value of the test statistic (iii) Rejection region: (iv) Conclusion: (vi) What assumption are necessary for the test in part d to be valid?


Extracted text: A study was designed to compare the attitudes of two groups of nursing students toward computers. Group 1 had previously taken a statistical methods course that involved significant computer interaction through the use of statistical packages. Group 2 had taken a statistical methods course that did not use computers. The students' attitudes were measured by administering the Computer Anxiety Index (CAIN). Assume that the population variances of the scores of the two groups are same. The results of the scores were as follows: Group 1 (with computers): n, =10 x, =60.3 S1 =7.5 Group 2 (without computers): n2 =15 x, =64.2 S2 =5.1 a. Define the two parameters in the words of the problem. b. Use a 90% confidence interval to estimate the difference between the mean Computer Anxiety Index scores of the two groups. c. Interpret the interval found in part b. d. Do the data show that the mean score for those with computer experience was