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Sketch the sampling distribution and show the area corresponding to the Pivalue. 073 72 71 [i 1 2 3 073 72 71 D 1 2 3 (d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis? Are the data statistically signicant at level a? D At the ex : 0.01 level, we reject the null hypothesis and conclude the data are statistically sig icant. D At the ex : 0.01 level, we reject the null hypothesis and conclude the data are not statistically signicant. 0 At the ex : 0.01 level, we fail to reject the null hypothesis and conclude the data are statistlcally signicant. 0 At the ex : 0.01 level, we fail to reject the null hypothesis and conclude the data are not statlstically signlcant. (e) Interpret your conclusion in the Context of the application. 0 There is suFclent evidence at the 0.01 level to conclude that the storm is lncreasing above the severe rating. 0 There is insufclent evidence at the 0.01 level to conclude that the storm is increasing above the severe rating. \fSketch the sampling distribution and show the area corresponding to the P-value. O 74 71 D Z 4 G) 0 rd 71 n 2 4 0 rd 71 D Z 4 0 74 71 D Z 4 G) (d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis? Are the data statistically signicant at level a? 0 At the a : 0.05 level, we reject the null hypothesis and conclude the data are statistically signicant. 0 At the a : 0.05 level, we reject the null hypothesis and conclude the data are not statistically signicant. 0 At the a : 0.05 level, we fail to reject the null hypothesis and conclude the data are statistically signicant. 0 At the a : 0.05 level, we fail to reject the null hypothesis and conclude the data are not statistically signicant. (e) Interpret your conclusion in the context of the application. 0 There is suFcient evidence at the 0.05 level to oonclude that the drug has changed the mean pH level of the blood. 0 There is insufcient evidence at the 0.05 level to conclude that the drug has changed the mean pH level of the blood. Let x be a random variable that represents the pH of arterial plasma (i.e., acidity of the blood). For healthy adults, the mean of the x distribution is u = 7.4. A new drug for arthritis has been developed. However, it is thought that this drug may change blood ph random sample of 41 patients with arthritis took the drug for 3 months. Blood tests showed that x = 8.4 with sample standard deviation s = 2.9. Use a 5% level of significance to test the claim that the drug has changed (either way) the mean pH level of the bl A USE SALT (a) What is the level of significance? State the null and alternate hypotheses. O Ho: M = 7.4; H: H= 7.4 O HO: M = 7.4 ; Him 7.4 O Ho: H > 7.4 ; H 1: 1 = 7.4 (b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. The Student's t, since the sample size is large and o is known. The standard normal, since the sample size is large and o is known. O The Student's t, since the sample size is large and o is unknown. The standard normal, since the sample size is large and o is unknown. What is the value of the sample test statistic? (Round your answer to three decimal places.) (c) Estimate the P-value. O P-value > 0.150 O 0.100 4.7%; H: M = 4.7%; right-tailed O Ho: M = 4.7%; H,: u = 4.7%; two-tailed O Ho: M = 4.7%; H1: M 4.7%; right-tailed b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. The standard normal, since we assume that x has a normal distribution with known a. O The Student's t, since n is large with unknown o. O The standard normal, since we assume that x has a normal distribution with unknown o. O The Student's t, since we assume that x has a normal distribution with known o. Compute the z value of the sample test statistic. (Round your answer to two decimal places.) X .(c)..Find.(or..estimate) the P-value. (Round your answer to four decimal places.) X Enter a number