A hospital reported that the nomal death rate for patients with etensive burns (more than 40% of skin area) has been significantly reduced by the use of new fluid plasma compresses. Before the new treatment, the mortality rate for extensive bum patients was about G0. Using the new compresses, the hospital found that only 44 of 95 patients with extensive bums died. Use a 1% leve of significance to test the claim that the mortality rate has dropped. What are we testing in this problem? O singie proportion (a) What is the level of signifcance? State the null and aitemate hypotheses. O Hp-06; H:p<0.6 O Hg:-0.6; H 0.6 O Ho:-0.6; H > 0.6 O Ho: p-0.6; H:p 0.6 O Ho:-0.6; H 0.6 O Ho: P- 0.6; Hạ: p> 0.6 (b) What sampling distribution will you use? What assumptions are you making? O The standard normal, since np <5 and ng 5. O The Student's t, since np>5 and ng > 5. O The Student's t, since np < S and ng < O The standard normal, since np >5 and ng > 5. What is the value of the sample test statistic? (Round your answer to two decimal places.) (e) Find (or estimate) the Pvalue O Pvalue> 0.250 O 0.125

A hospital reported that the nomal death rate for patients with etensive burns (more than 40% of skin area) has been significantly reduced by the use of new fluid plasma compresses. Before the new treatment, the mortality rate for extensive bum patients was about G0. Using the new compresses, the hospital found that only 44 of 95 patients with extensive bums died. Use a 1% leve of significance to test the claim that the mortality rate has dropped. What are we testing in this problem? O singie proportion (a) What is the level of signifcance? State the null and aitemate hypotheses. O Hp-06; H:p<0.6 O Hg:-0.6; H 0.6 O Ho:-0.6; H > 0.6 O Ho: p-0.6; H:p 0.6 O Ho:-0.6; H 0.6 O Ho: P- 0.6; Hạ: p> 0.6 (b) What sampling distribution will you use? What assumptions are you making? O The standard normal, since np <5 and ng 5. O The Student's t, since np>5 and ng > 5. O The Student's t, since np < S and ng < O The standard normal, since np >5 and ng > 5. What is the value of the sample test statistic? (Round your answer to two decimal places.) (e) Find (or estimate) the Pvalue O Pvalue> 0.250 O 0.125

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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 31PPS

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