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5.) "KAFE" coffee company claims that 60% of coffee drinkers prefer their coffee to Starbucks. 640...
I need help with 8.45 but youll need 8.38 for that 8.45 Sample size for coffee....
I need help with 8.45 but youll need 8.38 for that
8.45 Sample size for coffee. Refer to Exercise 8.38 where we analyzed data from a matched pairs study that compared preferences for instant versus fresh-brewed coffee. Suppose that you want to design a similar study. The null hypothesis is that instant and fresh-brewed are equally likely to be preferred and the alternative is two- sided. You will use a = 0.05. What is the sample needed to detect a...
A new soft drink company claims that people prefer it's cola over the currently dominant lime...
A new soft drink company claims that people prefer it's cola over the currently dominant lime soda. A random sample of 100 shoppers was selected. 70 of them said that they preferred the new cola. use a 5% significance level to test the company's claim. check your answer using the p value test??
An airline claims that the no-show rate for passengers is less than 5%. In a sample...
An airline claims that the no-show rate for passengers is less than 5%. In a sample of 420 randomly selected reservations, 19 were no-shows. At a = 0.01, test the airline's claim. Round p^ to the nearest thousandth when calculating the test statistic. Please answer all parts. b. What is the parameter being tested? C. What type of test is needed? d. What is ? e. What is p? f. What is n? Op-hat g. What is a Conduct the...
An e-commerce research company claims that 60% or more graduate students have bought merchandise on-line. A...
An e-commerce research 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% Type I error rate, and use both p-value and rejection region approaches. **Make...
can i get help answering these questions please E Question Help Consider a drug testing company...
can i get help answering these questions please
E Question Help Consider a drug testing company that provides a test for marijuana usage. Among 301 tested subjects, results from 25 subjects were wrong (either a faise positive or a false negative). Use a 0.01 significance level to test the claim that loss than 10 percent of the test results are wrong. 0 C. Ho: p = 0.1 H,<0.1 OD HD 0.1 H,:p>0.1 Library Identify the test statistic for this hypothesis...
Consider a drug testing company that provides a test for marijuara usage. Among 301 tested subjects,...
Consider a drug testing company that provides a test for marijuara usage. Among 301 tested subjects, results from 27 subjects were wrong (either a faise positive or a faise negative. Une 0.01 significance level to test the claim that less tha 10 percent of the best results are wrong. Identify the null and alterative hypotheses for this test. Choose the correct answer below. O A M:p=0.1 Hp01 OB. Hy:p 0.1 Hyp<0.1 OC. Hyp<0.1 Hp0.1 OD Mp=0.1 Hyp#01 Identity the best...
Assume that the data has a normal distribution and the number of observations is greater than...
Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. α-0.05for a left-tailed test. SELECT ALL APPLICABLE CHOICES B) 1.96 士1.96 ±1.645 1.645 E) None of these 19 Assume that a simple random sample has been selected from a normally distributed population and test the conclusion that addresses the original claim and select three correct choices. A test of sobriety SELECT ALL...
(1 point) An insurance company states that at least 86% of its claims are settled within...
(1 point) An insurance company states that at least 86% of its claims are settled within 30 days. A consumer group selected a random sample of 73 of the company's claims to test this statement. They found that 60 of the claims were settled within 30 days. Does the consumer group have evidence to disbelieve the insurance company's claim? 1. Write the hypotheses to test if the rate of claims settled within 30 days is significantly less than 86%. H0H0:...
Incorrect Question 6 0/1 pts Provide an appropriate response. A pharmaceutical company wishes to test a...
Incorrect Question 6 0/1 pts Provide an appropriate response. A pharmaceutical company wishes to test a new drug with the expectation of lowering cholesterol levels. Ten subjects are randomly selected and pretested. The results are listed below. The subjects were placed on the drug for a period of 6 months, after which their cholesterol levels were tested again. The results are listed below. (All units are milligrams per deciliter.) Test the company's claim that the drug lowers cholesterol levels. Use...
In a program designed to help patients stop smoking, 236 patients were given sustained care, and...
In a program designed to help patients stop smoking, 236 patients were given sustained care, and 84.3% of them were no longer smoking after one month. Use a 0.05 significance level to test the claim that 80% of patients stop smoking when given sustained care. Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho:p*0.8 H: p=0.8 OB. Ho: P = 0.8 H:p<0.8 @ C. Ho: p = 0.8 H:p*0.8 OD. Ho: p=0.8...
I need help with 8.45 but youll need 8.38 for that
8.45 Sample size for coffee. Refer to Exercise 8.38 where we analyzed data from a matched pairs study that compared preferences for instant versus fresh-brewed coffee. Suppose that you want to design a similar study. The null hypothesis is that instant and fresh-brewed are equally likely to be preferred and the alternative is two- sided. You will use a = 0.05. What is the sample needed to detect a...
An airline claims that the no-show rate for passengers is less than 5%. In a sample of 420 randomly selected reservations, 19 were no-shows. At a = 0.01, test the airline's claim. Round p^ to the nearest thousandth when calculating the test statistic. Please answer all parts. b. What is the parameter being tested? C. What type of test is needed? d. What is ? e. What is p? f. What is n? Op-hat g. What is a Conduct the...
can i get help answering these questions please
E Question Help Consider a drug testing company that provides a test for marijuana usage. Among 301 tested subjects, results from 25 subjects were wrong (either a faise positive or a false negative). Use a 0.01 significance level to test the claim that loss than 10 percent of the test results are wrong. 0 C. Ho: p = 0.1 H,<0.1 OD HD 0.1 H,:p>0.1 Library Identify the test statistic for this hypothesis...
Consider a drug testing company that provides a test for marijuara usage. Among 301 tested subjects, results from 27 subjects were wrong (either a faise positive or a faise negative. Une 0.01 significance level to test the claim that less tha 10 percent of the best results are wrong. Identify the null and alterative hypotheses for this test. Choose the correct answer below. O A M:p=0.1 Hp01 OB. Hy:p 0.1 Hyp<0.1 OC. Hyp<0.1 Hp0.1 OD Mp=0.1 Hyp#01 Identity the best...
Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. α-0.05for a left-tailed test. SELECT ALL APPLICABLE CHOICES B) 1.96 士1.96 ±1.645 1.645 E) None of these 19 Assume that a simple random sample has been selected from a normally distributed population and test the conclusion that addresses the original claim and select three correct choices. A test of sobriety SELECT ALL...
Incorrect Question 6 0/1 pts Provide an appropriate response. A pharmaceutical company wishes to test a new drug with the expectation of lowering cholesterol levels. Ten subjects are randomly selected and pretested. The results are listed below. The subjects were placed on the drug for a period of 6 months, after which their cholesterol levels were tested again. The results are listed below. (All units are milligrams per deciliter.) Test the company's claim that the drug lowers cholesterol levels. Use...
In a program designed to help patients stop smoking, 236 patients were given sustained care, and 84.3% of them were no longer smoking after one month. Use a 0.05 significance level to test the claim that 80% of patients stop smoking when given sustained care. Identify the null and alternative hypotheses for this test. Choose the correct answer below. O A. Ho:p*0.8 H: p=0.8 OB. Ho: P = 0.8 H:p<0.8 @ C. Ho: p = 0.8 H:p*0.8 OD. Ho: p=0.8...
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