19. Internet Use. In the article "Happier and Less Isolated: Internet Use in Old Age" (Journal of Poverty \& Social Justice, Vol. 21, Issue 1, pp. 33-45),researcher O. Lelkes explores the impact of Internet use. The following problem is based on the article. A random sample of adults yielded the following data on age and Internet usage.

Age
Usage		18-24	25-64	65+	Total
	Never	6	38	31	75
	Sometimes	14	31	4	49
	Every day	50	50	5	105
	Total	70	119	40	229

At the 1 % significance level, do the data provide sufficient evidence to conclude that an association exists between age and Internet usage?

Limit grouping with a first class of 40-44 and a class width of 5 yields the frequency distribution.

The breadth of the first class is 5 and the first class is 40-44. The second class, for example, is 45-49, and so on. The highest observation is also 69. As a result, the final class is 65-69. As a result, below is the frequency distribution using limit grouping:

Find the following class grades:

The formula is used to calculate the class grades.

$ClassMarks=\frac{Upperclasslimit-Lowerclasslimit}{2}$

As a result, the class grades for the classes acquired are

Limit grouping with a first class of 40-44 and a class breadth of 5 yields the relative-frequency distribution.

The formula for calculating relative frequency is:

$Relativefrequency=\frac{Frequency}{Numberofobservations}$

As a result, the relative-frequency distribution is as follows:

Based on the findings, use MINITAB to create a histogram for the provided data.

The histogram is built using the lower bounds of the limit grouping.

Procedure for MINITAB:

Step 1: Select Histogram from the Graph menu.

Step 2: Click OK after selecting Simple.

Step 3: In Graph variables, type AGE in the appropriate column.

Step 4: Click the OK button.

MINITAB Output:

The histogram is there is just one peak, indicating that the distribution is uni modal. The histogram is also symmetric.