test chapter 7 - «H. «r. 0‘3 e a” o a?” a” o e e...

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Unformatted text preview: «H. «r. 0‘3 e a” o a?” a” o e e as” 1n- » Question m @Qusfiun Snare: o of 1 pt Tar-l: 5mm: 55.3% (as? of 15 p13} Determine whether the statement is We or false. If it is false: rewIite it as a We statement. A large P—value in a test will favor a rejection of the null hypothesis. Choose the correct answer below. .31.?! A. False. A large P—value in a test will favor a rejection of the alternative hypothesis. -:j:j:- B. True. I2. False. A. small P—value in a test will favor a rejection of the null hypothesis. Question is complete. @Qufifinn Scare: 1 of 1 pt Use the given statement to represent a claim. Write its complement and state which is HID and which is cr = 13 Find the complement of the claim. cr =15 13 EWfichisHQandwhichisI-Ia? {fife H0: cr = 13 Hams-E13 {FD- H91: 2 13 Ha:fi=13 ail-l3. H931: 13 Ham} 13 Qu estien is ca mplete . «or. d: o” a“ a” o 9‘3 e on e 9 as 1v 1» Question 31.23 @Qufifinn Scare: o of 1 pt TEI: Scare: 55.3% (9.3? of 15 p15) Write the null and alternative hypotheses. Identify which is the claim. A light bulb manufacturer claims that the mean life of a certain type of light bulb is less than BSD hours. Choose the correct null and alternative hypotheses below. 3: iifl- H04]. 5 BED Z: :2 3. H0: [1: 35C! Hamisfififl Ha: pifiifl if! D. H0411: ESQ :j j: E. H1341: 3512} Ha: t1 asso Ha: F35“ Identify which is the claim. :3 The null hypothesis Hi:r is the claim. it!“ The altemative hypothesis HE is the claim. Question is complete. H 1t o” e a” 0" 6‘3 o o o“ a so 1:- » Question 31.25 @Qufifiun Scare: 1 of 1 pt TEtSEnre: 55.8% (as? of 15 p15) Write the null and alternative hypotheses. Identify which is the claim. A study claims that the mean survival time for certain cancer patients treated immediately with chemotherapy and radiation is 2.2 months. Choose the correct null and alternative hypotheses below. NIH-“t. Hfl:u=2,2 B. Hflmifl Hams-E22 Ha:u=2.2 D. H02p‘922 E. Hfl:p<22 Ha:p.=22 Ha:p=2.2 Identify which is the claim. The alternative hypothesis H3 is the claim. U' The null hypothesis H D is the claim. Question is complete. 4.4. 4: 0“" a“ 9‘” 0° 9"! a“ a“ a“ a“ is? s H- Question 11.39 @Qlflfiffllfl Ensure: 0.33 at 1 pt TEI: Score: 55.8% (43.3? of 15 p13} ' A financial analyst claims that the return rate of a 15—year bond has a standard deviation of less than 3.4%. Determine wheflier the hypofliesis test for this claim is left—tailed, right—tailed, or two—tailed. Explain your reasmsing. The hypofliesis test is left—tailed ‘ because the alternative hypofliesis contains s’. ‘_ Roll 1your mouse over the red indicators to see incorrect answers. G? 6) fi' 5 ours-soon ?. .133 {Jilluesfinn Score: 1 of 1 pt TestSmre: 55.3% (9.3? of 15 p13) 5 Idenlify the type I error and the type ll error that corresponds to the given hypothesis. The proportion of settled medical malpractice suits is {118. I.” urn.” Hus. a._r Hun-Hair ma...“ “an. Hy... III—1.1.!— Fail to reject the claim that the proportion of settled malpractice suits is i}. 18 when the ‘ proportion is actually {11%. Reject the claim that the proportion of settled malpractice suits is {113 when the n ® proportion is actually {11%. Reject the claim that the proportion of settled malpractice suits is G. 1 3 when the proportion is actually different fiom {113. Which of the following is a type ]I error? Fail to reject the claim that the proportion of settled malpractice suits is i}. 18 when the proportion is actually {118. Reject the claim that the proportion of settled malpractice suits is 0.13 when the proportion is actually {11%. Fail to reject the claim that the proportion of settled malpractice suits is {113 when the proportion is actually different fiom {113. lQuestion is complete. €59 €59 659 @ TE) 639 Queer-er- 17.45 1-. —\ Ix-J’I Question Score: 1. of 1. pt Test Score: 65.8% (5.8? of 1.5 FIG] 5 An automotive manufacturer claims the mean price of a small SUV is at least $25,631:“. If a hypothesis test is performed, how should you interpret a decision that {a} rejects the null hypothesis and {h} fails to reject the null hfliothesis? is at least $2535l'l‘. There is not enough evidence to support the claim that the mean price of a small SUV is at least $25,631} V There is sufficient evidence to indicate that the claim that the mean price of a small SUV is at least $25,631? is false. n C?) (h) Choose the correct answer below. There is sufficient esidence to indicate that the claim that the mean price of a small SUV is at least $25,631? is false. There is not enough evidence to support the claim that the mean price of a small SUV is at least $25,631} There is enough EVidEflCE to support the claim that the mean price of a small SUV is at least $25,611} V There is insufficient etidence to indicate that the claim that the mean price of a small SUV is at least $25,631? is false. 1‘ Questien is cemplete. @QflEfill‘l Score: 1 BF 1 pt Find the P—value for the indicated hypothesis test with the given standardized test statistic, 2. Decide whether to reject Hg, for the given level of significance E1. Right—tailed test with test statistic z = 1.05 and :1 = {11 P—value = .1469 {Round to four decimal places as needed.) State your conclusion. .3}? Fail to reject H0 Reject H0 Question is complete. @Qlflfiffllfl Score: 1 111‘ 1 pt Match each P—vslue wiflr the graph that (a) {b} correctly displays its area. 3| 2 4 4 P=fl2310 P=fl_1131 P = {1.13394 P = flfl 19? A SI 2 4133 4 4 - 2.06 P = {123 1D eerrespmrds te graph (b) _ (e) (:1) 3| 3| P = D.{}394 corresponds to graph {(1} . P = {11131 eerrespmsds to graph (c) _ Z Z —4 1.21 4 4-11.06 2.06 4 P = H.019? eerrespmrds to graph {a} _ Question is complete. Question F. 2. 13 @Qufifinn Score: 1 of 1 pt TEI: Score: 55.3% (9.3? of 15 p15) Determine whether to reject or fail to reject Hfl, at the level of significance of a) o = {1-K}? and b) o. = H.135. H0: [1 = 1445, Ha: u of 14s, and P = coast. a) Do you reject or fail to reject H0 at the fifl? level of significance? Fail to reject H0 because o. :3 flflfifll. E. Fail to reject I-Icr because :1 45. {143694. I2. Reject H0, because :1 «:1 {113594. V" D. Reject H0 because :1 :5 flflfifi. b) Do you reject or fail to reject H0 at the 0.05 level of significance? . Reject Hfl because o. 6. (1.411694. B. Fail to reject Hfl because no. 3» (1.411694. I2. Reject Hfl because no. 3» (1.411694. . Fail to reject Hfl because o. 6. (1.411694. Question is complete. H. a: 0" {£9 it?” {be five I" H @Qufifinn Score: 1 of 1 pt Find the critical 2 values. Assume that the normal distfibutien applies. Two—tailed test; (1 = {1.133 a = — 2.112.]? {Rmmd to two- deeima] places as needed. Use a comma to separate answers as needed.) Question is complete. Question F. 221‘ @Qufifiun Score: 1 of 1 pt TEtSEnr‘e: 553% (5.85" of 15 p15) A graph of a hypcrfliesis test is shown to the right. {a)State wheflier the graph shows a left—tailed, right—tailed, cur two—tailed test. {b)State whether a. = {1131, {1135, 0.111}, or 0.211} (a) The graph shows which type ofhypothesis test? A left—tailed test if A tight-tailed test A two—tailed test (b) What is the level of significance :1? H.211} Question is complete. _ _ __a“- ___ _ ___- A two—tailed test {13) What is the level of significance 0.? 43.242} {1131 {1. H} H" {LUIS «or d: a. (a? (a? a!” Eng 1- » Question 32.25 @Qufifinn Score: 0.25 of 1 p1: TEI: Score: 55.3% {9.3} cu“ 1.5 ms] State whether the standardized test statistic a El indicates that you should reject the null hypothesis. {a} 2:2366 {b} 2:2.131 (c) a: -2_{193 {d)z=2_515 .4 (a) For a = 2.366, should you reject or fail to reject the null hypothesis? a. Reject H0 because 2 6. 2.3313. In!" B. Reject HE, because a 3’ 2.3343. I2. Fail to reject Hi:r because 3 ii 2.3341}. D. Fail to reject H0 because a :3 2.3341}. (b) For a = 2.131, should you reject or fail to reject the null hypothesis? * A. Fall to reject Hi:r because a «:1 2.3343. Question is complete. (c) For a = - 2.093, should you reject or fail to reject the null hypothesis? 3'! fl. Reject H0 because 2 6. 2.3313. B. Fail to reject Hi:r because a :3 2.3343. I2. Reject H0 because 2 3* 2.3341}. 1* D. Fail to reject H4:r because 2 a: 2.3m. (d) For 2 = 2.515, should vou reject or fail to reject the null hypothesis? * Reject Hfl because 2:32.334}. Fail to reject Hfl because 24: 2.3311}. Reject Hfl because zst2.33{}. K Fail to reject Hfl because 2‘} 2.3341}. 19$ Quest-or. 32.3? ,-. x Ixxal Question Score: III DF 1 pt Test Score: 65.8% (9.8? DF 15 p13] IQ Test the given claim about the population mean u at the given level of significance using the given sample statistics. Claim: u. i moo; o = {3.03. Sample statistic s: E = 45343-0, s = 343, n = 41 Determine the outcome and conclusion of the test. Choose fiom the following. Fail to reject Hfl. At the 3% significance leveL there is not enough evidence to support the claim. Fail to reject Hfl. At the 3% significance leveL there is not enough evidence to reject the claim. Reject Hfl. At the 3% significance level, there is enough evidence to reject the claim. Reject Hfl. At the 3% significance level, there is enough evidence to support the claim. Question is complete. .-. \ Iflfifl Question Score: 0.29 0F 1. pt Test Score: 65.8% (9.8? 0F 15 FIG) A random sample of 3'5 eighth grade students' scores on a national mathematics assessment test has a mean score of 285 with a standard deviation of 33. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 28G. At or = flflfi, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify Hg and H3. Choose the correct answer A below. Ha: uszso (claim) Hg: FEED _ 3‘ Hfl; uEZEfl (claim) Ha: u :> aso Ha: H 3‘ 23002131111} Ha: u e 25o Hfl: u=28fl (claim) Hfl: uctfififl * Hfl; Hgggfl Ha: H a 23G Ha: |..L a zoo (claim) Ha: p 2» ago (claim) (Io) Find the standardized test statistic .71 and its corresponding area. If convenient. use technology. 2 = 131‘ [Round to two decimal places as needed.) Area = {1.9053‘ [Round to four decimal places as needed.) Roll your mouse over the red indicators to see incorrect answers. (c) Find the P—value. If convenient. use technology. P—val'ue= £1094?" (Round to four decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. Reject HE| V Fail to reject Hfl (e) Interpret your decision in the context of the original claim. At the 6% significance level, there is not enough evidence to suppon‘ the administrator's claim that the mean score for the state's eighth graders on the exam is more than 28G. ...
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test chapter 7 - «H. «r. 0‘3 e a” o a?” a” o e e...

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