Homework Answers
Answer-10 : The critical z-value for alpha=0.1 for a normal distribution is +-1.645 . (from a normal table)
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10.
Question 12 1 pts In a poker game there is...
Please answer all D Question 27 1 pts A politician claims that for the adult population...
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D Question 27 1 pts A politician claims that for the adult population of one town, the mean annual salary is u-$30,000 Sample data is collected: n-47, - $22,298, and s-$14,200. Use a significance level of a -0.10 to state the correct rejection region for a test of the claim. Time Attem 1 Ho eus 24/7 Reject Hoifz > 1.96 or z < -1.96. 5 Reject Hoitz < -2.576. Reject Ho if z > 1.96 Reject Ho...
Please answer both questions D Question 25 1 pts Time Ru Attempt 1 Hour, e Campus...
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D Question 25 1 pts Time Ru Attempt 1 Hour, e Campus 24/7 Pr A health insurer suspects that the average fee charged by one particular clinic for a medical procedure is higher than $1200. The insurer wants to perform a hypothesis test to determine whether their suspicion is correct. The hypotheses are: Hops $1200 H:p> $1200 Suppose that the test will be conducted at a 5% significance level, and the insurer plans to randomly sample...
Please answer all 3 questions 8. 7. Question 9 1 pts Assume that the data has...
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8.
7.
Question 9 1 pts 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. a=0.05 for a test of the hypothesis that the mean is greater than or equal to 98. 0 -2.326 0 -1.960 0 -1.645 O +1.645 O 1.960 Find the appropriate critical value (either Za/2 or ta/2) Confidence level = 99% and...
Please answer all Question 33 1 pts If the significance level for a hypothesis test is...
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Question 33 1 pts If the significance level for a hypothesis test is 0.01 and the p-value for the test ends up being 0.0034, after forming the appropriate conclusion based on the p-value, which possible error could have be committed, type I or type II. Since we did not reject the null, we might have committed a type one error. O Since we did not reject the null, we might have committed a type two error. Since...
Please answer all 3 questions Question 15 1 pts A local juice manufacturer distributes juice in...
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Question 15 1 pts A local juice manufacturer distributes juice in bottles labeled 12 ounces. A government agency thinks that the company is cheating its customers. The agency selects 50 of these bottles, measures their contents, and obtains a sample mean of 11.6 ounces with a standard deviation of 0.70 ounce. Use a 0.01 significance level to test the agency's claim that the company is cheating its customers. o test statistic--4.04; critical value = -2.326;...
Please answer all 3 questions mpus A test of sobriety involves measuring the subject's motor skills....
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mpus A test of sobriety involves measuring the subject's motor skills. Twenty randomly selected sober subjects take the test and produce a mean score of 41.0 with a standard deviation of 3.7. At the 0.01 level of significance, test the claim that the true mean score for all sober subjects is equal to 40.0. Use the traditional method of testing hypotheses. The results for the test turn out to be: Hopp = 40.0.HAP 40.0. Test...
please answer all questions 12-15 Question 12 2 pts The phrase statistically significant means that the...
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Question 12 2 pts The phrase statistically significant means that the op value associated with the test statistic is greater than the p level chosen o research finding is of practical importance o sample mean is larger than the population mean o data differ from what we would have expected by chance (if the null were true) Question 13 2 pts Garret thinks his car battery is becoming weak. He doesn't want to be stranded...
Please answer all questions Question 30 1 pts Solve the problem. To help consumers assess the...
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Question 30 1 pts Solve the problem. To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine found in all commercial brands of cigarettes. A new cigarette has recently been marketed. The FDA tests on this cigarette yielded mean nicotine content of 24.4 milligrams and standard deviation of 2.2 milligrams for a sample of r9 cigarettes. Construct a 95% confidence interval for the mean nicotine content...
Please answer all 3 questions Question 21 1 pts Express the null hypothesis Ho and the...
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Question 21 1 pts Express the null hypothesis Ho and the alternative hypothesis Hy in symbolic form. Use the correct symbol (.p.o)for the indicated parameter. A psychologist claims that more than 4.6 percent of the population suffers from professional problems due to extreme shyness. Use p, the true percentage of the population that suffers from extreme shyness. O Ho:p> 4.6% H:ps 4.6% O Ho:p-4.6% H:P < 4.6% O Ho:P 5 4.6% H:p> 4.6% O Ho:p...
Please answer all Question 24 1 pts Solve the problem. A 90% confidence interval for the...
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Question 24 1 pts Solve the problem. A 90% confidence interval for the average salary of all CEOs in the electronics industry was constructed using the results of a random survey of 45 CEOs. The interval was to make more useful inferences from the data, it is desired to reduce the width of the confidence interval. Which of the following will result in a reduced interval width? O Decrease the sample size and decrease the confidence level....
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D Question 27 1 pts A politician claims that for the adult population of one town, the mean annual salary is u-$30,000 Sample data is collected: n-47, - $22,298, and s-$14,200. Use a significance level of a -0.10 to state the correct rejection region for a test of the claim. Time Attem 1 Ho eus 24/7 Reject Hoifz > 1.96 or z < -1.96. 5 Reject Hoitz < -2.576. Reject Ho if z > 1.96 Reject Ho...
Please answer both questions
D Question 25 1 pts Time Ru Attempt 1 Hour, e Campus 24/7 Pr A health insurer suspects that the average fee charged by one particular clinic for a medical procedure is higher than $1200. The insurer wants to perform a hypothesis test to determine whether their suspicion is correct. The hypotheses are: Hops $1200 H:p> $1200 Suppose that the test will be conducted at a 5% significance level, and the insurer plans to randomly sample...
Please answer all 3 questions
8.
7.
Question 9 1 pts 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. a=0.05 for a test of the hypothesis that the mean is greater than or equal to 98. 0 -2.326 0 -1.960 0 -1.645 O +1.645 O 1.960 Find the appropriate critical value (either Za/2 or ta/2) Confidence level = 99% and...
Please answer all
Question 33 1 pts If the significance level for a hypothesis test is 0.01 and the p-value for the test ends up being 0.0034, after forming the appropriate conclusion based on the p-value, which possible error could have be committed, type I or type II. Since we did not reject the null, we might have committed a type one error. O Since we did not reject the null, we might have committed a type two error. Since...
Please answer all 3 questions
Question 15 1 pts A local juice manufacturer distributes juice in bottles labeled 12 ounces. A government agency thinks that the company is cheating its customers. The agency selects 50 of these bottles, measures their contents, and obtains a sample mean of 11.6 ounces with a standard deviation of 0.70 ounce. Use a 0.01 significance level to test the agency's claim that the company is cheating its customers. o test statistic--4.04; critical value = -2.326;...
Please answer all 3 questions
mpus A test of sobriety involves measuring the subject's motor skills. Twenty randomly selected sober subjects take the test and produce a mean score of 41.0 with a standard deviation of 3.7. At the 0.01 level of significance, test the claim that the true mean score for all sober subjects is equal to 40.0. Use the traditional method of testing hypotheses. The results for the test turn out to be: Hopp = 40.0.HAP 40.0. Test...
please answer all questions 12-15
Question 12 2 pts The phrase statistically significant means that the op value associated with the test statistic is greater than the p level chosen o research finding is of practical importance o sample mean is larger than the population mean o data differ from what we would have expected by chance (if the null were true) Question 13 2 pts Garret thinks his car battery is becoming weak. He doesn't want to be stranded...
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Question 30 1 pts Solve the problem. To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine found in all commercial brands of cigarettes. A new cigarette has recently been marketed. The FDA tests on this cigarette yielded mean nicotine content of 24.4 milligrams and standard deviation of 2.2 milligrams for a sample of r9 cigarettes. Construct a 95% confidence interval for the mean nicotine content...
Please answer all 3 questions
Question 21 1 pts Express the null hypothesis Ho and the alternative hypothesis Hy in symbolic form. Use the correct symbol (.p.o)for the indicated parameter. A psychologist claims that more than 4.6 percent of the population suffers from professional problems due to extreme shyness. Use p, the true percentage of the population that suffers from extreme shyness. O Ho:p> 4.6% H:ps 4.6% O Ho:p-4.6% H:P < 4.6% O Ho:P 5 4.6% H:p> 4.6% O Ho:p...
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Question 24 1 pts Solve the problem. A 90% confidence interval for the average salary of all CEOs in the electronics industry was constructed using the results of a random survey of 45 CEOs. The interval was to make more useful inferences from the data, it is desired to reduce the width of the confidence interval. Which of the following will result in a reduced interval width? O Decrease the sample size and decrease the confidence level....
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