Quastion 6Research has shown that ofese adult maleshave lower level's of festasterone Howeyert is unknown whether this same paternoccurs in adolescents A study was'conductethat measusedthe testasterond (in nmol/Itres in fwo independent, iandom Sample'sThe furst samp le included 1o obesea dolescents.Testosterone levelsHealthy WaightObese Adolescents-(n=D10)0.160:30 0311060020Adolesdents0.04036 010 0310.190-940-100.600.F3 0-941 b39|Mean- 0.2550Variana=0.0061Mean =0-5483Vanance 0.1389a) based on thLs sgmple informationdoes it appearthat the pop ulation vananas,are equal 'runequal.? txplain.5)1s there a sgnificant dffecence in thearerage testpstenonelevels befween obeseand tealthy,Weigt adolescents: To answerthis Conduct an appropnate bypothesistest using the,P-value method and anufıçant lulelof 540.What can you CONJlude about these two, qroups of adobatOWhat assumytion must be true for theresult in Porf (b) to be vellid.

Let X1 denotes the Obese adolescents and X2 denotes the healthy adolescents respectively. Two…

Answered: Research has shown that obese adult…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Suppose you took random samples from three distinct age groups. Through a survey, you determined how many respondents from each age group preferred to get news from T.V., newspapers, the Internet, or another source (respondents could select only one mode). What type of test would be appropriate to determine if there is sufficient statistical evidence to claim that the proportions of each age group preferring the different modes of obtaining news are not the same? Select from tests of independence, homogeneity, and goodness-of-fit.Since we are interested in proportions, the test for homogeneity is appropriate.Since we are determining if the current distribution fits the previous distribution of responses, the goodness-of-fit test is appropriate. Since we can claim all the variables are independent, the test of independence is appropriate.
Random samples of resting heart rates are taken from two groups. Population 1 exercises regularly, and Population 2 does not. The data from these two samples is given below: Population 1: 70, 70, 71, 67, 63, 62, 64 Population 2: 68, 74, 72, 73, 68, 73, 68, 71 Is there evidence, at an α=0.05 level of significance, to conclude that there those who exercise regularly have lower resting heart rates? Carry out an appropriate hypothesis test, filling in the information requested. A. The value of the standardized test statistic: B. The p-value is D. Your decision for the hypothesis test: A. Reject H0 B. Do Not Reject H0 C. Do Not Reject H1 D. Reject H1
A manufacturer of apple phone charges claims that only 4% of his production is defective. In a random sample of 120 items, the defect rate is 4.99%. At the 1% level of significance, test the manager's claim State the null and alternative hypotheses for the test. Calculate the value of the test statistic for this test
Elwin Osbourne, CIO at GFS, Inc., suspects that at least 25% of e-mail messages sent by GFS employees are not business related. A random sample of 300 e-mail messages was selected to test this hypothesis at the 0.01 level of significance. Sixty of the messages were not business related. The appropriate decision is _______. reject the null hypothesis maintain status quo increase the sample size fail to reject the null hypothesis gather more data
4. A researcher wishes to determine whether the blood pressure of vegetarians is, onaverage, lower than the blood pressure of nonvegetarians. Independent simple randomsamples of 85 vegetarians and 75 nonvegetarians yielded the following sample statisticsfor systolic blood pressure. Test the claim that vegetarians have lower blood pressure than nonvegetarians. Use a 0.05 level of significance.Vegetarians Non Vegetariansn=85 n=75Mean=124.1mmHg Mean=138.7mmHgSt dev=38.7mmHg St dev=39.2mmHgNull and alternative hypothesis (give both in symbolic form and sentence form):Test statistic and p-value (show the calculation or show what you entered into the calculator (screenshotsare ok here)):Technical conclusion, circle one: reject the null hypothesis or fail to reject the null hypothesisWhy did you choose to reject or fail to reject the null hypothesis?Nontechnical conclusion addressing the original claim:
Mendelian Genetics When Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted of 428 green peas and 152 yellow peas. Use a 0.01 significance level to test Mendel’s claim that under the same circumstances, 25% of offspring peas will be yellow. What can we conclude about Mendel’s claim?
A farming cooperative in Capetown buys wheat seeds for its farmer members from seed merchants. A particular seed merchant claims that their wheat seeds have at least an 80% germination rate. Before the farming cooperative will buy from this seed merchant, they want to verify this claim. A random sample of 320 wheat seeds supplied by this seed merchant was tested, and it was found that only 230 seeds germinated. Is there sufficient statistical evidence at the 3% significance level to justify the purchase of wheat seeds from this seed merchant? Use the p-value approach to conduct a hypothesis test for a single proportion, and report the findings to the Capetown farming cooperative.
A new operator was recently assigned to a crew of workers who perform a certain job. From the records of the number of units of work completed by each worker each day last month, a sample of size five was randomly selected for each of the two experienced workers and the new worker. At the ? = .05 level of significance, does the evidence provide sufficient reason to reject the claim that there is no difference in the amount of work done by the three workers? Workers New A B Units of work (replicates) 10 12 9 10 10 11 9 12 10 9 11 13 10 12 9 (a) Find the test statistic. (Give your answer correct to two decimal places.)(ii) Find the p-value. (Give your answer bounds exactly.) _____< p < ____(b) State the appropriate conclusion. Reject the null hypothesis, there is not significant evidence of a difference in units of work between the workers. Reject the null hypothesis, there is significant evidence of a difference in units of…

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