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Testing_for_Proportions

# 27 p value z 0005 if 90 of all chinese restaurants

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Unformatted text preview: Test for a Single Population Proportion Hypothesis Test for Diﬀerence in Two Population Proportions Step 3 z ≈ −3.27 p − value z ≈ 0.005 If 90% of all Chinese restaurants fail after one year and if another sample is observed, there is a 0.1% chance of getting a sample proportion less than 81%. 0.1% is a very small chance. Hypothesis Testing for Population Proportions Hypothesis Testing for Population Proportions Steps in Conducting a Hypothesis Test Hypothesis Test for a Single Population Proportion Hypothesis Test for Diﬀerence in Two Population Proportions Step 4 Since p-value ≈ 0.0005 < 0.05 reject H0 and accept Ha. There is statistically signiﬁcant evidence to support the claim that the percent of Chinese restaurants that fail after one year is diﬀerent from 90%. Hypothesis Testing for Population Proportions Hypothesis Testing for Population Proportions Steps in Conducting a Hypothesis Test Hypothesis Test for a Single Population Proportion Hypothesis Test for Diﬀerence in Two Population Proportions Review the Learning Goals Know how to test hypotheses concerning a population proportion Understand the meaning of p-value and how it is used. Understand the meaning of signiﬁcance level and how it is used. Know the conditions required for calculating a p-value and signiﬁcance level. Hypothesis Testing for Population Proportions Hypothesis Testing for Population Proportions Steps in Conducting a Hypothesis Test Hypothesis Test for a Single Population Proportion Hypothesis Test for Diﬀerence in Two Population Proportions Comparing two proportions - Step 1 - Hypotheses Two-tailed H0 : p1 = p2 Ha : p1 = p2 Left-tailed H0 : p1 = p2 H0 : p1 < p2 Right-tailed H0 : p1 = p2 H0 : p1 > p2 Hypothesis Testing for Population Proportions Hypothesis Testing for Population Proportions Steps in Conducting a Hypothesis Test Hypothesis Test for a Single Population Proportion Hypothesis Test for Diﬀerence in Two Population Proportions Step 2 - Prepare Select the test statistics Check the conditions and assumptions Select a sig...
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