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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 Tarl: 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
EWﬁchisHQandwhichisIIa? {ﬁfe H0: cr = 13 HamsE13 {FD H91: 2 13 Ha:ﬁ=13 aill3. 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
HamsE22 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 ourssoon ?. .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 HunHair 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 Queerer 17.45 1. —\
IxJ’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 4 411.06 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 = {1K}? 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 IIcr 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 tighttailed 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$ Questor. 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 = 453430, 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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This note was uploaded on 12/30/2009 for the course MATH 1410 taught by Professor Vergo during the Spring '09 term at Metropolitan Community College Omaha.
 Spring '09
 vergo
 Statistics

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