Chapter 5, Problem 9E

a)

To determine

To find the range of the sugar content.

Answer to Problem 9E

The range is between 0% to 70%.

Explanation of Solution

Given:

  

Calculation:

Above histogram shows the range of the sugar in cereals is between 0% to 70%.

b)

To determine

To explain the shape of the distribution.

Answer to Problem 9E

It is bimodal.

Explanation of Solution

Given:

  

Calculation:

The histogram having two peaks; therefore, it has bimodal distribution.

c)

To determine

To explain the aspects of breakfast.

Answer to Problem 9E

The fact is amount of sugar.

Explanation of Solution

Given:

  

Calculation:

As we know, the cereals of adults contain very low percentage of sugar. But the cereals of children contain high percentage of sugar.

d)

To determine

To explain whether sugar is higher in cereals of children than adults.

Answer to Problem 9E

Yes.

Explanation of Solution

Given:

  

Calculation:

The cereals of adults contain very low percentage of sugar. But the cereals of children contain high percentage of sugar. The boxplot also suggests the same.

e)

To determine

To explain which group varies more in sugar content.

Answer to Problem 9E

Adult.

Explanation of Solution

Given:

  

Calculation:

The IQR of adult cereals is higher than the children. Hence, adult sugar content varies more than children.