p = proportion of students who drop out due to lack of economic resourcesA sociologist thinks that in his country the percentage of students who drop out due to lack of economic resourcesis different from 40%.identify1. The research hypothesis H12. The null hypothesis HO3. The rejection region of the null hypothesisSelect one:1. Н%: р 3D 0.42. Hо: р 2 0.43. (-00, -z] U [z,00)1. H1: p + 0.042. Hо: р %3D 0.043. (-00, -z] U [z , 0)1. H;: p = 0.42. Họ: p + 0.43. [z, 00)1. H1: p + 0.42. Hо: р %3D 0.43. (-0о , -2]

The claim is that the percentage of students who drop out due to lack of economic resources is…

Answered: p = proportion of students who drop out…

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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In a study with a non-directional hypothesis… A) There are two rejection regions that have the same area that adds up to the alpha level. B) There is a single rejection region with an area that corresponds to the alpha level. C) There are two rejection regions that have the same area that adds up to the p-value. D) There is a single rejection region with an area that corresponds to the p-value.
A random sample of 50 students was asked to estimate how much money they spent on textbooks in a year. The sample skewness of these amounts was found to be 0.83 and the sample kurtosis was 3.98. Test at the 10% level the null hypothesis that the population dis- tribution of amounts spent is normal.
The average drying time of a manufacturer’s paint is 20 minutes. Investigating the effectiveness of a modifica-tion in the chemical composition of her paint, the manu-facturer wants to test the null hypothesis μ = 20 minutes against a suitable alternative, where μ is the average dry-ing time of the modified paint. (a) What alternative hypothesis should the manufactureruse if she does not want to make the modification in thechemical composition of the paint unless it decreases thedrying time?(b) What alternative hypothesis should the manufactureruse if the new process is actually cheaper and she wants tomake the modification unless it increases the drying timeof the paint?
A cream with alpha-hydroxy acid, advertises that it can reduce wrinkles and improve the skin. In a study published in Archives of Dermatology (June 1996), 49 middle-aged women used a cream with alpha-hydroxy acid for 22 weeks. At the end of the study period, a dermatologist judged whether each woman exhibited any improvement in the condition of her skin. The results for the 49 women (where I = improved skin and N = no improvement) were: 32 I’s and 17 N’s. (a) Find a 95% confidence interval for p, the true population proportion of middle-aged women with improved skin after using this cream. Interpret the interval. (b) What assumptions are required for the confidence interval of part (a) to be statistically valid? (c) Are the assumptions for part (b) reasonably satisfied? Explain.
A researcher is testing the effect of marijuana use on reaction time. A sample of n = 9 students is obtained and each student is given a dose of marijuana. Thirty minutes later, each student's reaction time is measured in a driving simulator. The scores for the sample of students averaged M = 211 milliseconds with SS = 1152. Assuming that reaction time for students in the regular population averages μ = 200 milliseconds, are the data sufficient to conclude that the medication has a significant effect on reaction time? Test at the .05 level of significance. Which of the four options below is the best answer? Type the letter “A” or “B” etc. in the box Option A. Accept the null, marijuana has no effect on reaction time Option B. Accept the null, marijuana does affect reaction time Option C. Reject the null, marijuana has no effect on reaction time Option D. Reject the null, marijuana does affect reaction time Compute r 2, the percentage of variance explained by the treatment effect.…
I need help in this mcq. A company claims that its new viral vaccine is 90% effective in preventing a contagious viraldisease. Suppose that in a clinical trial with 3000 respondents, 2640 did not get infected by thisdisease.At 1% level of significance, what is the critical region? Solve and choose the best answer among the optionsa)z <-2.58b)z > 1.96c)z > 2.58d)z < -1.96
An education researcher claims that 57% of college students work year-round. In a random sample of 500 college students, 285 say they work year-round. At α=0.05, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state H0 and Ha. (b) Find the critical value(s) and identify the rejection region(s) (c) Find the standardized test statistic z . (d) Decide whether to reject or fail to reject the null hypothesis and interpret the decision in the context of the original claim.
You are conducting a Mann Whitney U test The U statistic is 40 and the critical U value is 20 Is your result significant? Yes, because the U statistic is higher than the critical value Yes, because the U statistic is not higher than the critical value No, because the U statistic is higher than the critical value No, because the U statistic is not higher than the critical value Choose one
A geneticist conducted a hybridization experiment with peas, which resulted in offspring consisting of 410 peas with green pods and 150 peas with yellow pods. According to Mendel’s theory, 1/4 of the offspring peas should have yellow pods. Use a 0.05 significance level to test the claim that the proportion of peas with yellow pods is equal to 0.25.a. H0: ______________b. HA: ______________c. Type of hypothesis test: __________________d. Critical value: ___________e. Test statistic value: ____________f. P-value: ____________g. Decision: _____________________________h. Conclusion: _____________________________________________
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In the Chernobyl nuclear accident it is estimated that 30,000 people received an average dose of 45 REM. For this population, using the linear hypothesis, how many "normal" deaths from cancer are expected and how many additional deaths from the radiation of the accident? Group of answer choices 500 normal, 6000 additional 1000 normal, 4000 additional 2000 normal, 3000 additional 4000 normal, 1000 additional 6000 normal, 500 additional
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