Chapter CSB, Problem 7.1E

a.

To determine

Identify the height and lowest scores.

Answer to Problem 7.1E

  $\begin{array}{l}heightestscore=130\\ lowestscore=90\end{array}$

Explanation of Solution

Given information:

Stem-and-leaf plot for Charmaine’s computer game scores.

  $\begin{array}{ccccccccccccccc}Stem& Leaf& & & & & & & & & & & & & \\ 9& 0& 0& 0& 1& 3& 4& 5& 5& 7& 8& 8& 8& 9& 9\\ 10& 0& 3& 4& 4& 5& 6& 9& & & & & & & \\ 11& 0& 3& 9& 9& & & & & & & & & & \\ 12& 1& 2& 6& & & & & & & & & & & \\ 13& 0& & & & & & & & & & & & & \end{array}$

  $Key12|6=126$

Calculation:

Write the score from given plot,

  $\begin{array}{l}90,90,90,91,93,95,95,97,98,98,98,99,99\\ 100,103,104,104,105,106,109\\ 110,113,119,119\\ 121,122,126\\ 130\\ heightestscore=130\\ lowestscore=90\end{array}$

b.

To determine

Identify the most frquenctly occurred scores.

Answer to Problem 7.1E

  $90and98$

Explanation of Solution

Given information:

Stem-and-leaf plot for Charmaine’s computer game scores.

  $\begin{array}{ccccccccccccccc}Stem& Leaf& & & & & & & & & & & & & \\ 9& 0& 0& 0& 1& 3& 4& 5& 5& 7& 8& 8& 8& 9& 9\\ 10& 0& 3& 4& 4& 5& 6& 9& & & & & & & \\ 11& 0& 3& 9& 9& & & & & & & & & & \\ 12& 1& 2& 6& & & & & & & & & & & \\ 13& 0& & & & & & & & & & & & & \end{array}$

  $Key12|6=126$

Calculation:

Write the score from given plot,

  $\begin{array}{l}90,90,90,91,93,95,95,97,98,98,98,99,99\\ 100,103,104,104,105,106,109\\ 110,113,119,119\\ 121,122,126\\ 130\\ 90and98\end{array}$

c.

To determine

Identify the score above $115$.

Answer to Problem 7.1E

  $6$

Explanation of Solution

Given information:

Stem-and-leaf plot for Charmaine’s computer game scores.

  $\begin{array}{ccccccccccccccc}Stem& Leaf& & & & & & & & & & & & & \\ 9& 0& 0& 0& 1& 3& 4& 5& 5& 7& 8& 8& 8& 9& 9\\ 10& 0& 3& 4& 4& 5& 6& 9& & & & & & & \\ 11& 0& 3& 9& 9& & & & & & & & & & \\ 12& 1& 2& 6& & & & & & & & & & & \\ 13& 0& & & & & & & & & & & & & \end{array}$

  $Key12|6=126$

Calculation:

Write the score from given plot,

  $\begin{array}{l}90,90,90,91,93,95,95,97,98,98,98,99,99\\ 100,103,104,104,105,106,109\\ 110,113,119,119\\ 121,122,126\\ 130\\ Above115scoresare\\ 119,119,121,122,126,130\\ =6\end{array}$