u1 = average of the grades of the students who were taught fractions with procedure Aµ2 = average of the grades of the students who were taught fractions with procedure BA fourth grade teacher believes that Procedure A for teaching fractions is better than Procedure B.identifyThe research hypothesis H1The null hypothesis H0The rejection region of the null hypothesis1. H1: 41 < H22. Hg: H1 > H23. (-00, -tin-1)]H1: H1 – H2 < 0Họ: H1 - H2 > 01. H;: H1 > H22. Ho: μι < μ23. (-00 , tin-1)]H;: H1 - H2 > 0Ho: 41 - H2 < 01. H1: H1 > H22. Họ: H1 < H23. [t(n-1) , 0)H1: H1 – H2 > 0Họ: 41 – H2 < 01. H;: H1 < H22. Ho: μι > μ23. [tin-1) , 0)H;: H1 – H2 < 0Ho: 41 - H2 > 0

We have given that μ1 = average of the grades of the students who were taught fractions with…

Answered: identify The research hypothesis H1 The…

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter7: Applying Fractions

Section7.1: Ratios

Problem 25WE

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A manufacturer wants to increase the shelf life of a line of cake mixes. Past records indicate that the average shelf life of the mix is 231 days. After a revised mix has been developed, a sample of nine boxes of cake mix gave these shelf lives (in days): 230,233, 235, 236, 233, 240, 240, 241, and 237. Using α = 0.025, has the shelf life of the cake mix increased? Multiple Choice Yes, because computed t is greater than the critical value. Yes, because computed t is less than the critical value. No, because computed t lies in the region of acceptance. No, because 236.11 is quite close to 231.
Tests for tuberculosis like all other diagnostic tests are not perfect. QFT-G is one of such tests for tuberculosis. Suppose that for the population of adults that is taking the test, 5% have tuberculosis. The test correctly identifies 74.6% of the time adults with a tuberculosis and correctly identifies those without tuberculosis 76.53% of the time. Suppose that POS stands for the test gives a positive result and S means that the adult really has tuberculosis. Represent the "76.53%" using notation. P(S) P(SC) O P(POSC | Sº) O P(POS | C)
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A team of researchers working on the development of vaccines conducted a study on two vaccines. Thirty individuals participated in the study and were randomly assigned to two groups and one group received vaccine 1 and the other group vaccine 2. The researchers then measured the amount of antibody in the individuals' blood after ingestion, entered R and calculated some fish sizes that can be seen here below. x̄1 = 494,54, s1 =52,39, x̄2 = 467,93, s2 = 45,20, d = 26,61, sd = 68,69. Blood levels of antibodies can be expected to follow normal distribution. Use α = 0,05. a) What is the value of the test size to check if there is a difference in the distribution of antibody levels for the two drugs?b) What is the value of the test size to check if there is a difference in the mean amount of antibody in the blood after taking the two vaccines?c) What conclusion do you draw from the hypothesis test in point b about the possible difference in the mean amount of antibody after oral…
A team of researchers working on the development of vaccines conducted a study on two vaccines. Thirty individuals participated in the study and were randomly assigned to two groups and one group received vaccine 1 and the other group vaccine 2. The researchers then measured the amount of antibody in the individuals' blood after ingestion, entered R and calculated some fish sizes that can be seen here below. x̄1 = 494,54, s1 =52,39, x̄2 = 467,93, s2 = 45,20, d = 26,61, sd = 68,69. Blood levels of antibodies can be expected to follow normal distribution. Use α = 0,05. c) What conclusion do you draw from the hypothesis test in point b about the possible difference in the mean amount of antibody after oral administration of the vaccines? d) The researchers also created a 95% confidence interval for the difference between the averages. Will the confidence interval contain the value 0? Justify your answer without calculating the confidence interval.e) Let us now assume that there is in fact…

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