Course evaluation ratings for four college instructors are shown in the following table. Use a = .05 and test for a significant difference among the rating for these instructors.  What is your conclusion?   Instructor Black Jennings Swanson Wilson 88 87 88 80 80 78 76

A national survey of graduate students is conducted to assess their consumption of coffee. The following table summarizes the data. What proportion of coffee drinkers (caffeinated and decaffeinated) is female?     Do Not Drink Coffee Drink Decaffeinated Only Drink Caffeinated Coffee Male 145 92 370 Female 80 128 447   70 50 554 546

The following table represents the survey conducted in a school.   Male female Chicken fried steak 26 16 Chicken nugget 17 25 What percent of students like to have chicken nugget?

In the class poll from the beginning of the year, you were asked what color car you drive. The results are summarized below. aqua 3 beige/tan/gold 39 black 80 blue 44 green 21 orange 3  pink 1 purple 3 red 45 silver 63 white 74 yellow 1 What is the mode for this data set?