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1. An e-commerce résearch company claims that 60% or more graduate students have bought merchandise on-line. A consumer group is suspicious of the claim and thinks that the proportion is lower than 60%. A random sample of 80 graduate students show that only 22 students have ever don so. Is there enough evidence to show that the true proportion is lower than 60%? Conduct the test at 10% significance level. Ston 1 E.C

1. An e-commerce résearch company claims that 60% or more graduate students have bought merchandise on-line. A consumer group is suspicious of the claim and thinks that the proportion is lower than 60%. A random sample of 80 graduate students show that only 22 students have ever don so. Is there enough evidence to show that the true proportion is lower than 60%? Conduct the test at 10% significance level. Ston 1 E.C

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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nesis Testing for Proportions Practice E O Format Tools Add-ons Help Last edit was seconds ago Normal text Arial 8 BIUA 中田回▼ 三, 三三▼ 1. An e-commerce résearch company claims that 60% or more graduate students have bought merchandise on-line. A consumer group is suspicious of the claim and thinks that the proportion is lower than 60%. A random sample of 80 graduate students show that only 22 students have ever done so. Is there enough evidence to show that the true proportion is lower than 60%? Conduct the test at 10% significance level. Step 1.5: Check the conditions with np >5 and nq > 5 to be sure we can use a normal distribution. Step 2. State the null hypothesis and alternate hypothesis From "...enough evidence to show that the true proportion is lower...," we write the alternate hypothesis H,: p Step 3. Identify the statistical test to use and find the test statistic. Use z-test because about proportions/percent. H,: p Find z = z = pq Step 4: hand). Use the online calculator to determine the p-value (after you have found z by P-value = Step 5. If the p-value is lower than a, reject the null. If the p-value is greater than a, fail to reject the null (or accept the null).
Transcribed Image Text:nesis Testing for Proportions Practice E O Format Tools Add-ons Help Last edit was seconds ago Normal text Arial 8 BIUA 中田回▼ 三, 三三▼ 1. An e-commerce résearch company claims that 60% or more graduate students have bought merchandise on-line. A consumer group is suspicious of the claim and thinks that the proportion is lower than 60%. A random sample of 80 graduate students show that only 22 students have ever done so. Is there enough evidence to show that the true proportion is lower than 60%? Conduct the test at 10% significance level. Step 1.5: Check the conditions with np >5 and nq > 5 to be sure we can use a normal distribution. Step 2. State the null hypothesis and alternate hypothesis From "...enough evidence to show that the true proportion is lower...," we write the alternate hypothesis H,: p Step 3. Identify the statistical test to use and find the test statistic. Use z-test because about proportions/percent. H,: p Find z = z = pq Step 4: hand). Use the online calculator to determine the p-value (after you have found z by P-value = Step 5. If the p-value is lower than a, reject the null. If the p-value is greater than a, fail to reject the null (or accept the null).
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