Problem

Question 8 of 9 This quiz: 20 1 - 9.2) This questio Test the hypothesis using the P-value approach. Be sure to verify the requirements of the test. \[ \begin{array}{l} H_{0}: p=0.3 \text { versus } H_{1}: p>0.3 \\ n=100 ; x=35 ; \alpha=0.05 \end{array} \] 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.) Identify the P-value. P-value $=\square$ (Round to three decimal places as needed.) Choose the correct result of the hypothesis test for the P-value approach below. A. Reject the null hypothesis, because the P-value is greater than $\alpha$. B. Do not reject the null hypothesis, because the P-value is less than $\alpha$. C. Do not reject the null hypothesis, because the P-value is greater than $\alpha$. D. Reject the null hypothesis, because the P-value is less than $\alpha$.

Solution

Step 1 :Calculate the test statistic, z0, using the formula: \(z0 = \frac{{\hat{p} - p0}}{{\sqrt{{p0 * (1 - p0) / n}}}}\)

Step 2 :Substitute the given values into the formula: \(z0 = \frac{{0.35 - 0.3}}{{\sqrt{{0.3 * (1 - 0.3) / 100}}}}\)

Step 3 :Simplify the equation to get: \(z0 = \frac{{0.05}}{{\sqrt{{0.21 / 100}}}}\)

Step 4 :Further simplify to get: \(z0 = \frac{{0.05}}{{0.0458}}\)

Step 5 :Round the result to two decimal places to get: \(z0 = 1.09\)

Step 6 :Find the P-value, which is the probability of observing a test statistic as extreme as z0, given that the null hypothesis is true. Since this is a one-tailed test (H1: p > 0.3), find the area to the right of z0 = 1.09 on the standard normal distribution.

Step 7 :Using a standard normal (Z) table or a calculator, find that the area to the left of z0 = 1.09 is approximately 0.8621. Therefore, the area to the right (which is the P-value) is 1 - 0.8621 = 0.1379 (rounded to four decimal places).

Step 8 :Compare the P-value to the significance level, \(\alpha = 0.05\). If the P-value is less than \(\alpha\), reject the null hypothesis. If the P-value is greater than \(\alpha\), do not reject the null hypothesis.

Step 9 :Since 0.1379 > 0.05, do not reject the null hypothesis. Therefore, the final answer is: \(\boxed{\text{Do not reject the null hypothesis, because the P-value is greater than } \alpha}\)

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Source: https://solvelyapp.com/problems/P36AZHaSIJ/

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