Independent random samples were selected from two quantitative populations, with sample data given below. Using the p-value approach for the data given below, is there sufficient evidence to show that u, is larger than H, at the 1% level ofsignificance?n1= 34,n2 = 42, x1 = 36.7, x, = 33.5,s, = 5.0, s2 = 3.3Use the value of the test statistic 3.21 to calculate the p-value for the test. (Round your answer to four decimal places.)p-value =

Answered: Image /qna-images/answer/9d502e55-b34c-4a38-aa22-49377ac14d92.jpg

Answered: Independent random samples were…

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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SAT scores are normally distributed with a mean of 1,800 and a variance of 22,500. Given arandom classroom of 400 students, about how many should have scores between 1350 and1950?
For a sample of n = 11 scores with SS = 440. What is the sample variance and the estimated standard error? %3D s2 = and sM=
A repeated-measures related samples study is used to compare two treatments with a sample of n=4 participants. These data produces Mp=3 with SS==48 for the set of difference scores. What is the repeated-measures t statistic for these data? A. 3/4=0.75 B. 3/ square root 3 = 1.73 C. 3/16=0.19 D. 3/2=1.50
At 10% level of significance, you fail to reject H : Median¸ = Median = Medianc . The p-value for the test statistic is O a. smaller than 10% O b. greater than 5% but less than 10% c. greater than 10% O d. smaller than 1%
The proportion of students who pass the Virginia 8th grade SOL test before 2005 on the first try was greater than 84%. If a new random sample of 1250 test scores is collected to determine if the pass rate is still above 84% and 1075 students passed, what is the P-value and decision of this test? Test at the 0.05 level of significance. Assume all conditions are met and use the one sample Z-test on the proportion. P-value = 0.9731. Reject the null hypothesis. P-value = 0.9731. Do not reject the null hypothesis. P-value = 0.0269. Do not reject the null hypothesis. P-value = 0.0269. Reject the null hypothesis.
You are comparing the variability of two groups of data to see if they come from the same population. Sample sizes are 11 (larger range) and 16. What is the critical test statistic assuming alpha = 0.05? %3D O 1.00 O 2.49 O 3.80 O 2.54
What is the mean for the difference scores for the following data from a repeated-measures study, which requires a dependent t-test for evaluation? T1 T2 Dscores 5 13 2 10 6 6 7 15
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Don't need help with first part of a, got that figured out. Recall that small effects may be statistically significant if the samples are large. A study of small-business failures looked at 147 food-and-drink businesses. Of these, 103 were headed by men and 44 were headed by women. During a three-year period, 15 of the men's businesses and 6 of the women's businesses failed. (a) Find the proportions of failures for businesses headed by men (sample 1) and businesses headed by women (sample 2). These sample proportions are quite close to each other. p̂men = p̂women = Give the P-value for the z test of the hypothesis that the same proportion of women's and men's businesses fail. (Use the two-sided alternative.) The test is very far from being significant. (Round your test statistic to two decimal places and your P-value to four decimal places.) z = P-value = (b) Now suppose that the same sample proportions came from a sample of 30 times as large. That is, 180 out of…
Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires caused by humans in the west? 356 of the 579 randomly selected wildfires looked at in the south were caused by humans while 322 of the 597 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the a = 0.01 level of significance? a. For this study, we should use z-test for the difference between two population proportions b. The null and alternative hypotheses would be: Ho: p1 p2 v (please enter a decimal) H1: p1 V p2 v (Please enter a decimal) c. The test statistic z v = 2.620 (please show your answer to 3 decimal places.) d. The p-value = 0.0213 e. The p-value is >v a f. Based on this, we should reject g. Thus, the final conclusion is that ... (Please show your answer to 4 decimal places.) |the null hypothesis. O The results are statistically significant at a = 0.01, so there is sufficient evidence to conclude that the proportion of the 579…
Two samples with P, =.25,n, = 36 and p, = .3,n, = 49. Test if populations p, # p, at a= 0.05 level of significance. 8 %3D
Compute the test statistic using the given information. Use three decimal places Ho:p 0.55 H3:p< 0.55 sample size 150 number of element in the sample 69 %3D P(1-p)

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