91Ó°ÊÓ

given,

A project exploring the bottled-water phenomenon and preference of water types was conducted by researchers M. Lunsford and A. Fink in the article "Water Taste Test Data" (Journal of Statistics Education, Vol. 18, No. 1).

Hypotheses are provided below:

Null hypothesis:

$H_0$:- The data do not provide sufficient evidence to conclude that the four different types of water are not equal in selection.

Another hypothesis:

$H_1:-$ The data provides sufficient evidence to conclude that the four different types of water are not equal in selection.

MINITAB process:

Step 1: Select Status> Tables> Chi-Square-Goodness-of-Fit Test (Single Variables).

Step 2: In the visual calculation, enter the "O" column

Step 3: In the category names, enter the "BRAND" column.

Step 4: Under Test, select the "P" column with seamless values.

Step 5: Click OK.

Chi-Square Goodness-of-Fit Test for Observed Counts in Variable: O

Here, the p-value is than the level of significance.

That is, $p-value(=0.000)<\mathrm{Î\pm }(=0.05)$

Thus, the null hypothesis is rejected at $5\%$level.

Thus, the data provided is sufficient evidence to conclude that the four different types of water are not equal in choosing the level of importance.