Biology Skills Refer to Exercise 8.47. In addition to tests involving biology concep...

Biology Skills Refer to Exercise 8.47. In addition to tests involving biology concepts, students were also tested on process skills. The results of pretest and posttest scores, published in The American Biology Teacher, are given below.

a. Find a 95% confidence interval for the mean score on process skills for the posttest for all BACC classes.

b. Find a 95% confidence interval for the mean score on process skills for the posttest for all traditional classes.

c. Find a 95% confidence interval for the difference in mean scores on process skills for the posttest BACC classes and the posttest traditional classes.

d. Does the confidence interval in c provide evidence that there is a real difference in the mean process skills scores between posttest BACC and traditional class scores? Explain.

Reference:

Teaching Biology An experiment was conducted to compare a teacher-developed curriculum, “Biology: A Community Context” (BACC) that was standards-based, activity-oriented, and inquiry centered to the traditional presentation using lecture, vocabulary, and memorized facts. The perhaps not-so startling results when students were tested on biology concepts, published in The American Biology Teacher, are shown in the following table.

a. Find a 95% confidence interval for the mean score for the posttest for all BACC classes.

b. Find a 95% confidence interval for the mean score for the posttest for all traditional classes.

c. Find a 95% confidence interval for the difference in mean scores for the posttest BACC classes and the posttest traditional classes.

d. Does the confidence interval in c provide evidence that there is a real difference in the posttest BACC and traditional class scores? Explain.