What is the power of the planned studies to the right using a chi-square test for independence withp<0.05?Predicted Effect SizeDesign2x2N(а)(b)(C)(d)Small25Medium2x2200Small2x250Hypotheses at the 0.05 Significance Level table.2х3LargeLargeMedium200(e)2x550(f)2x4100

Answered: Design What is the power of the planned…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Poly(3-hydroxybutyrate) (PHB), a semicrystalline polymer that is fully biodegradable and biocompatible, is obtained from renewable resources. From a sustainability perspective, PHB offers many attractive properties though it is more expensive to produce than standard plastics. The accompanying data on melting point (°C) for each of 12 specimens of the polymer using a differential scanning calorimeter appeared in an article. (b) the sample variance s2 from the definition [Hint: First subtract 180 from each observation.] (c) the sample standard deviation (d) s2 using the shortcut method
In 2016, the variance of scores in the class of OMG 321 was 21. Recently, a sample of 20 students had a variance of 25. We are interested in testing to see if there has been a significant change in the variance of scores in OMG 321. ( α = 0.05?) a) formulate the hypotheses At a 95% confidence, calculate the test statistics (chi-square value) and test the hypotheses (round the first decimal). b) What are the critical values? What is the conclusion? Develop the 95% interval estimate of the variance for the population. Please round to the second decimal place. Clearly state answers please.
The city council is considering a law that would ban the use of plastic bags, straws, and eating utensils at all city events. A sample has been selected from the community and tested for support of the ordinance. Is there a statistically significant relationship between political party affiliation and support for the anti-plastic law (use p=.05, χ2(critical) = 3.841)? Use the five step model as a guide and write a sentence or two interpreting your results. Democrat Republican row marginals Support For 36 19 55 Opposed 12 33 45 column marginals 48 52 100
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Allopurinol test is often used as a screening device of potential carriers whose relatives are OTCD (a disorder of the urea cycle) patients. The sensitivity and the specificity of the allopurinol test are estimated as 0.927 and 0.997, respectively. If the prevalence of individuals with OTCD in the population is 1/32000, determine the predictive value negative of the allopurinol screening test.
You want to run a 2-tailed independent t-test on sample 1 (M = 24.3, SD = 1.6) and sample 2 (M = 27.5, SD = 1.8), which each have sample size = 5. You have set Alpha = 0.01. Assume equal variances and calculate t_obs.
Faculty assumed that two populations have ENTIRELY UNKNOWN VARIANCES, (01)² and (02)². Samples of size ni = n2 = n = 10 were collected and summarized, with summaries presented in the table shown on page 2. The objective is to draw conclusions about µ = µ1 – µ2, the difference of two population means. At the significance level, a = 0.05, do you have evidence that the graduates had a higher population average grade than undergrads? 1. Show critical value with indication of the source you got it 2. State rejection rule 3. Evaluate the test statistic and formulate your decision
sample of n=25 college students was given problem solving task at noon one day and again at noon the following day. THe students were not permitted any sleep between the two tests. for each student, the differences between the first and second score was recoreded. for this ksample, the students averaged MD=4.7 points better on the first test with a variance of s2=64 for the difference scores. Do the data indicate significant change in problem solving ability? Use a two tailed test with .05. Compute an estimated Cohen's d to measure the size of the effect.
Below is R output for a 2´2 bivariate table that cross-tabulates subjective social class (that is, the social class to which the respondent believes they belong) and how fundamentalist the respondent is in terms of their religion. Note that the relationship is statistically significant (X^2 = 38.99; p < .001). The (lambda) statistic is reported below the table. What is its interpretation? How is the interpretation of lambda different or unique from phi and Cramér’s ?
Suppose that a sample of n = 12 pairs of X and Y scores has SSY = 90 and a Pearson correlation of r = +0.40. Does the regression equation predict a significant portion of the variance? Test with α = .05.(hint: SStotal = SSY; r2 = SSregression/SSTotal)
For the general population, the average fatigue level is μ = 50. A researcher is testing the hypothesis that engaging a meditation exercise reduces employee fatigue. A sample of n = 30 participants is obtained, and each participant engaged in a meditation exercise for 20 minutes at work each workday for a month. This sample’s average fatigue level was M = 46 with a sample variance of 100 after the month. Please write out the four steps for this hypothesis test assuming an alpha level of .05. Step 1: State your hypotheses Step 2: Find your critical regions in a distribution Step 3: Data Analysis Step 4: Making a decision
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Design What is the power of the planned studies to the right using a chi-square test for independence with p<0.05? Predicted Effect Size (a) (b) (c) (d) (e) (f) Small 2x2 25 Medium 2x2 200 Small 2x2 50 Hypotheses at the 0.05 Significance Level table. Large Large Medium 2x3 2x5 2x4 200 50 100