Chapter 1.1, Problem 24E

(a)

To determine

To calculate the proportion of students from United States.

Answer to Problem 24E

Proportion = 0.518

Explanation of Solution

Given:

The Dataset:

		Country
		U.K.	U.S.
	Fly	54	45
	Freeze time	52	44
Superpower	Invisibility	30	37
	Super strength	20	23
	Telepathy	44	66

Calculation:

The number of students from United States = 215

Total no. of students being surveyed = 415

  $\begin{array}{c}\text{Proportion of students from United states =}\frac{\text{ 215}}{415}\\ =0.518\\ =51.8\%\end{array}$

(b)

To determine

To calculate the relative frequencies of superpower.

Explanation of Solution

Calculation:

  

		Country
		U.K.	U.S.	Frequency	Relative frequency
	Fly	54	45	99	0.24
	Freeze time	52	44	96	0.23
Superpower	Invisibility	30	37	67	0.16
	Super Strength	20	23	43	0.10
	Telepathy	44	66	110	0.27

The telepathy has the highest relative frequency, and the super strength has the lowest relative frequency.

(c)

To determine

To calculate the percentage of students from United Kingdom and prefer the telepathy.

Answer to Problem 24E

10.6%

Explanation of Solution

Calculation:

The number of students from united kingdom and refer the telepathy = 44

Total no. of students from being surveyed = 415

Therefore,

  $\begin{array}{c}\text{Proportion= }\frac{44}{415}\\ =0.106\\ =10.6\%\end{array}$