A group of toxicologists investigated the impact of exposure to low oxygen on the mortality of rice weevils. In an experiment, 31,386 of 31,421 rice weevils were found dead after exposure to nitrogen gas for 4 days. In a second experiment, 23,515 of 23,676 rice weevils were found dead after exposure to nitrogen gas for 3.5 days. Conduct a test of hypothesis to compare the mortality rates of adult rice weevils exposed to nitrogen at the two exposure times. Is there a significant difference (at a= 0.10) in the mortality rates?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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Author:HOLT MCDOUGAL
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Chapter11: Data Analysis And Probability
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A group of toxicologists investigated the impact of exposure to low oxygen on the mortality of rice weevils. In an experiment, 31,386 of 31,421 rice weevils were found dead after exposure to nitrogen gas for 4 days. Ina second experiment, 23,515 of
23,676 rice weevils were found dead after exposure to nitrogen gas for 3.5 days. Conduct a test of hypothesis to compare the mortality rates of adult rice weevils exposed to nitrogen at the two exposure times. Is there a significant difference (at a = 0.10) in
the mortality rates?
Give the null and alternative hypotheses. Let p, represent the proportion of rice weevils found dead in the first experiment and p, represent the proportion of rice weevils found dead in the second experiment. Choose the correct answer below.
ОА. Но (Р, - Р2) -0
H,: (P, - P2) #0
OC. Hg: (P1 - P2) #0
H3: (P, - P2) = 0
O E. Ho: (P1 - P2) <0
0 = (2d - 'a) :H
O B. Ho: (P, - P2) = 0
H: (P, - P2) >0
O D. Ho: (P, - P2) = 0
На (р, - р) <0
OF. Ho: (P, - P2) >0
H: (P, - P2) = 0
Find the test statistic.
The test statistic is z=
(Round to two decimal places as needed.)
Find the p-value.
The p-value is N.
(Round to four decimal places as needed.)
State your conclusion
Ho. There is
V evidence to conclude that the mortality rate after 4 days of exposure is
the mortality rate after 3.5 days of exposure.
Transcribed Image Text:A group of toxicologists investigated the impact of exposure to low oxygen on the mortality of rice weevils. In an experiment, 31,386 of 31,421 rice weevils were found dead after exposure to nitrogen gas for 4 days. Ina second experiment, 23,515 of 23,676 rice weevils were found dead after exposure to nitrogen gas for 3.5 days. Conduct a test of hypothesis to compare the mortality rates of adult rice weevils exposed to nitrogen at the two exposure times. Is there a significant difference (at a = 0.10) in the mortality rates? Give the null and alternative hypotheses. Let p, represent the proportion of rice weevils found dead in the first experiment and p, represent the proportion of rice weevils found dead in the second experiment. Choose the correct answer below. ОА. Но (Р, - Р2) -0 H,: (P, - P2) #0 OC. Hg: (P1 - P2) #0 H3: (P, - P2) = 0 O E. Ho: (P1 - P2) <0 0 = (2d - 'a) :H O B. Ho: (P, - P2) = 0 H: (P, - P2) >0 O D. Ho: (P, - P2) = 0 На (р, - р) <0 OF. Ho: (P, - P2) >0 H: (P, - P2) = 0 Find the test statistic. The test statistic is z= (Round to two decimal places as needed.) Find the p-value. The p-value is N. (Round to four decimal places as needed.) State your conclusion Ho. There is V evidence to conclude that the mortality rate after 4 days of exposure is the mortality rate after 3.5 days of exposure.
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