Giving a test to a group of students, the grades and gender are summarized below Total A. В C Male 20 14 43 Female 19 12 49 Total 38 28 26 92 Let T represent the percentage of all female students who would receive a grade of C on this test. Use a 98% confidence interval to estimate p to three decimal places. Enter your answer as a tri-linear inequality using decimals (not percents).

I need help explaining parts a and b.

q3-  For categorical data: Select one or more: a. We can't apply boxplot to show its distribution b. We can apply aggregate functions. c. We can't use histogram to show its distribution. d. The interval between units is the same.

Need to understand how to solve in excel or using megastat.  This is practice exam   Suppose Bank of America would like to investigate if the credit score and income level of an individual are independent of one another. Bank of America selected a random sample of 400 adults and asked them to report their credit score range and their income range. The following contingency table presents these results.   Credit Score Class Less than 650 650–750 More than 750 Income < $50,000 30 24 27 $50,000 ≤ Income < $100,000 42 47 38 $100,000 ≤ Income < $150,000 49 35 26 Income ≥ $150,000 27 29 26 The expected number of individuals with income between $50,000 and $100,000 and a credit score less than 650 is ________.   Multiple Choice   23.5   26.0   31.0   47.0