Refer to Exercise 2.187. Fourteen students participated in a 10-week extensive reading program in a second-semester Japanese

Question:

Refer to Exercise 2.187. Fourteen students participated in a 10-week extensive reading program in a second-semester Japanese language course. The number of books read by each student and the student's grade in the course are listed in the next table.

a. Construct a stem-and-leaf display for the number of books read by the students.

b. Highlight (or circle) the leaves in the display that correspond to students who earned an A grade in the course. What inference can you make about these students?

Number of Books Course Grade <AABAA AARACBBE 8号导品才列8424加

c. Find the mean, median, and mode of the number of books read. Interpret these values.
d. What do the mean and median indicate about the skewness of the distribution of the data?
e. Find the mean and standard deviation of the number of books read by students who earned an A grade.
f. Find the mean and standard deviation of the number of books read by students who earned either a B or C grade.
g. Refer to parts a and b. Which of the two groups of students has a more variable distribution for number of books read?
h. Find the z-score for an A student who read 40 books. Interpret the result.
i. Find the z-score for a B or C student who read 40 books. Interpret the result.
j. Which of the two groups of students is more likely to have read 40 books? Explain.

Distribution
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