Chapter 2.1, Problem 2.25E

(a)

To determine

To construct: the pie chart on the basis of given data.

Explanation of Solution

Given:

R R  R R  R R  R R  R R  R L  R R

R R  R R  R R  R R  R R  R R  R A

R R  R R  A R  R L  R R  R R  L A

R R  R R  R R  R R

Calculation:

Right-handed	44
Left-handed	3
Ambidextrous	3

Graph:

  

By seeing the pie chart is clearly observed that the there is maximum percentage of right handed which is 88% and other two parameter which is left-handed and ambidextrous both are 6%.

I

(b)

To determine

To Calculate: the percentage of the population would estimate is left handed and justify it.

Answer to Problem 2.25E

  $\text{P}\left(\text{left-handed}\right)=6\%$

Explanation of Solution

Given:

Right-handed	44
Left-handed	3
Ambidextrous	3

Formula used:

  $\text{Probability}\text{=}\frac{\text{Favourable Cases}}{\text{Total}\text{Cases}}$

Calculation:

  $\begin{array}{c}\text{P}\left(\text{left-handed}\right)=\frac{3}{50}\\ =6\%\end{array}$

On the basis of given data that is total 50 randomly selected student in which right handed and left handed are 44 and 3 respectively and ambidextrous are 3. The probability will be calculated as favourable cases divided by total cases so got 6% which means that this much of percentage of the population would be estimated to be left-handed.