15 multiple choice questions.

Just want to check my answers.

They should be fairly straight forward.

Thank you!

QUESTION 1 Sleep experts believe that sleep apnea is more likely to occur in men than in the general population, that is the percentage of men who suffer from sleep apnea is greater than 8%%. To test this claim. one expert examined 75 men and found that 10 of these men suffer from sleep apnea. What are the Null and Alternative Hypotheses? O Ho: p = 0.08 Ha: p 0.08 O Ho: p = 0.08 Ha: p # 0.08 O Ho: p > 0.08 Ha: p s 0.08 QUESTION 2 Sleep experts believe that sleep apnea is more likely to occur in men than in the general population, that is the percentage of men who suffer from sleep apnea is greater than 89%. To test this claim. men and found that 10 of these men suffer from sleep apnea. Set up the appropriate hypothesis test and find the standardized test statistic. expert examined 75 O t= 1.70 O Z = 1.29 O Z = 1.70 O p-hat = 0.13 QUESTION 3 its believe that sleep apnea is more likely to occur in men than in the general population, that is the percentage of men who suffer from sleep apnea is greater than 8%. To test this claim, one expert examined 75 men and found that 10 of these men suffer from sleep apnea. Set up the appropriate hypothesis test and find the P-value for this hypothesis test (based on the answer to the previous question). 0.09 0.05 0.95 O 0.04 QUESTION 4 Based on Questions 1 - 3 state a vel of Significance. O Reject Ho O Fail to Reject Ho O Accept Ha O Reject Ha QUESTION 5 Interpret the results of Question 4. O At a significance level of 0.05, there is not enough evidence to reject the expert's claim that the percentage of men with sleep apnea is greater than 8%. O At a significance level of 0.05, there is enough evidence to reject the expert's claim that the percentage of men with sleep apnea is greater than 8%. O At a significance level of 0.05, the evidence does not support the expert's claim that the percentage of men with sleep apnea is greater than 8%. O At a significance level of 0.05, the evidence supports the expert's claim that the percentage of men with sleep apnea is greater than 8%. QUESTION 6 A farmer decides to try out a new fertilizer on a test plot containing 10 stalks of corn. Before applying the fertilizer, he measures the height of each stalk. Two weeks later, after applying the fertilizer, he measures the stalks again. He compares the heights of these stalks to 10 stalks that did not receive fertilizer. Did the fertilizer help? Use a significance level of 0.10 to test whether the height of the stalks increased. d = height before - height after. What are the Null and Alternative Hypotheses? O Ho: Ud = 0 Ha: ud * 0 O Ho: Hd 2 0 Ha: Hd 0 O Ho: Hd = 0 Ha: Ud > 0 QUESTION 7 A farmer decides to try out a new fertilizer on a test plot containing 10 stalks of corn. Before applying the fertilizer, he measures the height of each stalk. Two weeks later, after applying the fertilizer, he measures the stalks again . He compares the heights of these stalks to 10 stalks that did not receive fertilizer. Did the fertilizer help? Use a significance level of 0.10 to test whether the st whether the height of the stalks increased. The differences are calculated and the mean difference is found to be -1.18 inches with a standard deviation of 1.05 inches. Set up the appropriate hypothesis test and find the standardized test statistic. Ot = 2.81 Ot = 3.55 Ot - -3.55 Ot = -2.81 QUESTION 8 A farmer decides to try out a new fertilizer on a test plot containing 10 stalks of corn. Before applying the fertilizer, he measures the height of each stalk. Two weeks later, after applying the fertilizer, he measures the stalks again. He compares the heights of these stalks to 10 stalks that did not receive fertilizer. Did the fertilizer help? Use a significance level of 0.10 to test whether the height of the stalks increased. Set up the appropriate hypothesis test and find the P-value based on your previous answers at the 0.10 Level of significance. O 0.003 O 0.997 O 0.010 O 0.006 QUESTION 9 Based on Questions 6 - 8 state a conclusion at the 0.10 Level of Significance. O Reject the Null Hypothesis O Fail to Reject the Null Hypothesis (Ho) in favor of the Alternative. O Reject the Alternative Hypothesis (Ha) in favor of the Null O Fail to Reject the Alternative Hypothesis (Ha) in favor of the Null. QUESTION 10 Interpret the results of Question 9. O There is enough evidence at the alpha - 0.10 level to reject that the fertilizer helps increase the height of the corn stalks. O There is not enough evidence at the alpha = 0.10 level to reject that the fertilizer helps increase the height of the corn stalks. O There is enough evidence at the alpha = 0.10 level to suggest that the fertilizer helps increase the height of the corn stalks. O There is not enough evidence at the alpha = 0.10 level to suggest that the fertilizer helps increase the height of the corn stalks. QUESTION 11 A labor union claims that the mean income of its members is no more than $20,000 per year. The Employers' Association believes that this claim is too low and members yields a mean income of $20,278.50 with a standard deviation of $793.81. State the pair of hypotheses for this claim. ean income is higher. A random sample of 64 union O HO: H = 20,000 Ha: H # 20,000 O HO: H S 20,000 Ha: H > 20,000 O Ho: H 2 20,000 Ha: H 20,000 QUESTION 12 A labor union claims that the mean income of its members is no more than $20,000 per year. The Employers' Association believes that this claim is too low and that the actual mean income is higher. A random sample of 64 union members yields a mean income of $20,278.50 with a standard deviation of $793.81. Calculate the standardized test statistic. O -0.35 O 0.35 O -2.81 O 2.81 QUESTION 13 or union claims that the mean income of its members is no more than $20,000 per year. The Employers' Association believes that this claim is too low and that the actual mean income is higher. A random sample of 64 union members yields a mean income of $20,278.50 with a standard deviation of $793.81. Find the P-value according to your previous answers. 0.003 O 0.364 O 0.997 O 0.006 QUESTION 14 A labor union claims that the mean income of its members is no more than $20,000 per year. The Employers' Association believes that this claim is too low and that the actual mean income is higher. A random sample of 64 O Reject Ho union members yields a mean income of $20,278.50 with a standard deviation of $793.81. State a conclusion based on this test at the 0.05 level of significance. O Fail to Reject Ho O Accept Ha O Reject Ha QUESTION 15 Interpret the results of Question 14. O There is not enough evidence at the a = 0.05 level to reject the Labor Union's claim that the mean salary is no more than $20,000. O There is enough evidence at the a = 0.05 level to reject the Labor Union's claim that the mean salary is no more than $20,000. O At the a = 0.05 level, the evidence supports the La an salary is no more than $20,000. O At the a = 0.05 level, the evidence does not support the Labor Union's claim that the mean salary is no more than $20,000