An instructor wishes to review students doing poorly in his large-room lecture courses so that he can schedule individual appointments with them and offer extra help. He has time to meet with only 15 students. The data in the table below lists student ID numbers and their current averages in the course. The professor asks you, as the teaching assistant, to answer the following questions.
a. Create a Pareto chart showing the grades of the 15 students currently doing the worst.
b. Report what percentage of the total range of grades is represented by the range of the 15 worst grades.
2. A health inspector at a restaurant will enter the kitchen and
choose 5 stations to
inspect from a predetermined list of 15 stations present in most restaurant kitchens.
b. If all sets are equally likely, what is the probability of each set?
c. If the inspector were instead to randomly select 13 stations
to inspect, how many different sets of 13 stations would exist?
d. If all sets were equally likely, what is the probability of
3. Since careful records have begun being kept in January, Eric's small business has delivered the following quantities of flowers throughout town.
4. Consider the following data values of variables x and y.
X 5 4 3 6 9 8 10
Y 7 8 10 5 2 3 1
Construct a scatter diagram of the data points and plot the least squares regression line on it. Find the least squares regression line.
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