Problem

31 points Part 1 of 3 Points: 0 of 1 Test the hypothesis using the P-value approach. Be sure to verify the requirements of the test. \[ \begin{array}{l} H_{0}: p=0.7 \text { versus } H_{1}: p>0.7 \\ n=100 ; x=85 ; \alpha=0.05 \end{array} \] Click here to view page 1 of the table. Click here to view page 2 of the table. Calculate the test statistic, $\mathrm{z}_{0}$. \[ \mathrm{z}_{0}=\square \] (Round to two decimal places as needed.)

Solution

Step 1 :Given that the sample proportion \(\hat{p} = \frac{x}{n} = \frac{85}{100} = 0.85\), the hypothesized population proportion \(p_0 = 0.7\), and the sample size \(n = 100\)

Step 2 :We can calculate the test statistic for a hypothesis test for a proportion using the formula: \(z = \frac{\hat{p} - p_0}{\sqrt{\frac{p_0(1 - p_0)}{n}}}\)

Step 3 :Substitute the given values into the formula: \(z = \frac{0.85 - 0.7}{\sqrt{\frac{0.7(1 - 0.7)}{100}}}\)

Step 4 :Simplify the denominator: \(z = \frac{0.15}{\sqrt{0.0021}}\)

Step 5 :Calculate the square root: \(z = \frac{0.15}{0.0458257569495584}\)

Step 6 :Finally, calculate the value of z: \(z = 3.27\)

Step 7 :So, the test statistic \(z_0\) is approximately \(\boxed{3.27}\) (rounded to two decimal places)

From Solvely APP
Source: https://solvelyapp.com/problems/KDXP8wmwsx/

Get free Solvely APP to solve your own problems!

solvely Solvely
Download