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Many financial institutions are unwittingly training their online customers to take risks with their passwords and other sensitive acc information, leaving them more vulnerable to fraud. Researchers at the University of Michigan found design flaws in 78% of the 214 financial institution websites they studied. Is the sample evidence sufficient to conclude that more than three out of four of these websites are prone to fraud? Use a 5% significance level for the test. a. Select the null and the alternative hypotheses. He: p = 0.75; HA: P = 0.75 He: p ≤ 0.75; HA: P >0.75 He: pz 0.75; HA: P < 0.75 b. Calculate the sample proportion. (Round your answer to 2 decimal places.) Sample proportion c. Calculate the value of test statistic. (Round final answer to 2 decimal places.) Test statistic N

Many financial institutions are unwittingly training their online customers to take risks with their passwords and other sensitive acc information, leaving them more vulnerable to fraud. Researchers at the University of Michigan found design flaws in 78% of the 214 financial institution websites they studied. Is the sample evidence sufficient to conclude that more than three out of four of these websites are prone to fraud? Use a 5% significance level for the test. a. Select the null and the alternative hypotheses. He: p = 0.75; HA: P = 0.75 He: p ≤ 0.75; HA: P >0.75 He: pz 0.75; HA: P < 0.75 b. Calculate the sample proportion. (Round your answer to 2 decimal places.) Sample proportion c. Calculate the value of test statistic. (Round final answer to 2 decimal places.) Test statistic N

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Many financial institutions are unwittingly training their online customers to take risks with their passwords and other sensitive account information, leaving them more vulnerable to fraud. Researchers at the University of Michigan found design flaws in 78% of the 214 financial institution websites they studied. Is the sample evidence sufficient to conclude that more than three out of four of these websites are prone to fraud? Use a 5% significance level for the test. a. Select the null and the alternative hypotheses. He: p= 0.75; HA: P * 0.75 He: p s 0.75; HA: p > 0.75 He: p = 0.75; HA: P < 0.75 b. Calculate the sample proportion. (Round your answer to 2 decimal places.) Sample proportion c. Calculate the value of test statistic. (Round final answer to 2 decimal places.) Test statistic 3 d. Find the p-value. p-value < 0.01 0.01 s p-value < 0.025 0.025 s p-value < 0.05 0.05 s p-value <0.10 p-value z 0.10 e. At the 5% level of significance, what is the conclusion? Reject He: the claim is supported by the data. Reject He: the claim is not supported by the data. Do not reject He; the claim is supported by the data. Do not reject He: the claim is not supported by the data.
Transcribed Image Text:Many financial institutions are unwittingly training their online customers to take risks with their passwords and other sensitive account information, leaving them more vulnerable to fraud. Researchers at the University of Michigan found design flaws in 78% of the 214 financial institution websites they studied. Is the sample evidence sufficient to conclude that more than three out of four of these websites are prone to fraud? Use a 5% significance level for the test. a. Select the null and the alternative hypotheses. He: p= 0.75; HA: P * 0.75 He: p s 0.75; HA: p > 0.75 He: p = 0.75; HA: P < 0.75 b. Calculate the sample proportion. (Round your answer to 2 decimal places.) Sample proportion c. Calculate the value of test statistic. (Round final answer to 2 decimal places.) Test statistic 3 d. Find the p-value. p-value < 0.01 0.01 s p-value < 0.025 0.025 s p-value < 0.05 0.05 s p-value <0.10 p-value z 0.10 e. At the 5% level of significance, what is the conclusion? Reject He: the claim is supported by the data. Reject He: the claim is not supported by the data. Do not reject He; the claim is supported by the data. Do not reject He: the claim is not supported by the data.
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