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4. A professor of economic statistics recently adopted a new textbook At the completion of the course, 100 randomly selected students were asked to assess the book. The responses can range from Excellent, Good, Adequate, or Poor. Refer to the table listed below: Number of Students Excellent 29 Good 60 Adequate 7 Poor (a) Does the data allow us to conclude at the 5% significance level that less than 50% of all economic students would rate the book as good? 1. Use P value and rejection region approach. (b) Construct a 95% confidence interval estimator for the population proportion of economic students who would rate the book as good. Report the lower and upper confidence limits within the context of the