Problem

Provide an appropriate response. A sports statistician is interested in determining if there is a relationship between the number of home team and visiting team losses and different sports. A random sample of 526 games is selected and the results are given below. Find the critical value $x_{\alpha}^{2}$ to test the claim that the number of home team and visiting team losses is independent of the sport. Use $a=0.01$. \begin{tabular}{l|cccc} & Football & Basketball & Soccer & Baseball \\ \hline Home team losses & 39 & 156 & 25 & 83 \\ Visiting team losses & 31 & 98 & 19 & 75 \end{tabular} 9.348 7.815 11.345 12.838

Solution

Step 1 :A sports statistician is interested in determining if there is a relationship between the number of home team and visiting team losses and different sports. A random sample of 526 games is selected and the results are given below. Find the critical value $x_{\alpha}^{2}$ to test the claim that the number of home team and visiting team losses is independent of the sport. Use $\alpha=0.01$.

Step 2 :egin{tabular}{l|cccc} & Football & Basketball & Soccer & Baseball \\ \hline Home team losses & 39 & 156 & 25 & 83 \\ Visiting team losses & 31 & 98 & 19 & 75 \end{tabular}

Step 3 :We can calculate the critical value for a given significance level and degrees of freedom using the chi-square distribution.

Step 4 :Let's denote the significance level as $\alpha = 0.01$ and the degrees of freedom as $df = 3$.

Step 5 :The critical value $x_{\alpha}^{2}$ can be calculated as $x_{\alpha}^{2} = \text{chi2.ppf}(1 - \alpha, df)$, where chi2.ppf is the percent point function (inverse of cdf — percentiles) of the chi-square distribution.

Step 6 :Substituting the given values, we get $x_{\alpha}^{2} = \text{chi2.ppf}(1 - 0.01, 3)$.

Step 7 :Calculating the above expression, we get $x_{\alpha}^{2} = 11.344866730144373$.

Step 8 :Rounding to three decimal places, we get $x_{\alpha}^{2} = 11.345$.

Step 9 :Final Answer: The critical value $x_{\alpha}^{2}$ to test the claim that the number of home team and visiting team losses is independent of the sport is \(\boxed{11.345}\).

From Solvely APP
Source: https://solvelyapp.com/problems/W3UgY7zkuo/

Get free Solvely APP to solve your own problems!

solvely Solvely
Download