A study at a Southern university reported that the average final exam grade of students who chose to enroll in an online version of a class was equal to that of students who took the class on-campus from the same professor. Fill in the following table. Is there a control treatment (and, if so, what is it)? Is there any accounting for individual variation? Is there repetition in the experiment? What, if any, confounding variables are not addressed in the experiment? Can we say with some confidence that on-line learning is as effective as traditional in-class learning?

A study at a Southern university reported that the average final exam grade of students who chose to enroll in an online version of a class was equal to that of students who took the class on-campus from the same professor. Fill in the following table. Is there a control treatment (and, if so, what is it)? Is there any accounting for individual variation? Is there repetition in the experiment? What, if any, confounding variables are not addressed in the experiment? Can we say with some confidence that on-line learning is as effective as traditional in-class learning?

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter19: Population Genetics And Human Evolution

Section: Chapter Questions

Problem 7QP: How Can We Measure Allele Frequencies in Populations? Drawing on your newly acquired understanding...

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150 patients with Crohn’s disease are given an experimental treatment in which they all drink “cocktails” containing thousands of pinworm eggs. Within one week, 72% of the patients report a reduction in their abdominal pain. Fill in the following table. Is there a control treatment (and, if so, what is it)? Is there any accounting for individual variation? Is there repetition in the experiment? What, if any, confounding variables are not addressed in the experiment? Can we say with some confidence that ingesting pinworm eggs is an effective treatment for the symptoms of Crohn’s disease?
In the F2 generation, 306 rabbits with red eyes and 71 with a white eye phenotype suppose the calculated x2 value is 0.35. Find the x2 range using the distribution chart. What is the p-value range? using these information do you accept or reject the null hypothesis? The distribution chart is attached below.
How are the standard deviation and variance related to each other? How are they different than just measuring the range? Can plot samples of dandelion cover from two different locations have the same mean but different variance? Explain. Can you answer question 3? Thanks.
Provide an example of a research project in your hometown where you would choose to use a t-test for independent samples. Would you use a one-tail or two-tail test, and why? What is your null hypothesis and research hypothesis? If you have a sample size of 500, should you interpret the statistical significance or the effect size?
Assume that a Chi-square test was conducted to test the goodness of fit to a 3:1 ratio and that a Chi-square value of 2.62 was obtained (Table value is equal to 3.84). Should the null hypothesis be accepted? How many degrees of freedom would be associated with this test of significance?
For the trichome selection experiment, the null hypothesis is that there will be no difference between the mean number of trichomes in the second generation compared to the parent generation. The following bar graph shows the data from the experiment, including error bars showing ± 2 standard deviations (a measure of variation for a group of data as a whole). Based on the data provided, do you reject or fail to reject the null hypothesis? Select the answer that most strongly supports your choice and correctly justifies the response. Based on the data provided, do you reject or fail to reject the null hypothesis? Select the answer that most strongly supports your choice and correctly justifies the response. A. Reject the null hypothesis, as variation, shown by the error bars, is greater after selection. B. Reject the null hypothesis, as there is no overlap between the means as shown by the error bars. C. Reject the null hypothesis, as the error bars for the two groups show…
In your F2 light treatment vial, you observe the following data: 5 white-eyed males, 18 wild-type males, 7 white-eyed females, and 10 wild-type females. What is the white-eyed allele frequency in this generation? Leave your answer as a decimal. Give the explanation also.
There are two incomplete-dominant alleles for petal color in a population of flowers. 36% of the flowers have red petals, 16% of the organisms have white petals, and 48% of the flowers have pink petals. What percentage of alleles in this population code for red petals (R)? how can i calculate it?
We have learned that the response to selection is equal to the selection differential times the narrow-sense heritability, and that the narrowsense heritability includes only the additive genetic variance. Why aren’t the dominance genetic variance and the gene interaction variance included? Why don’t they contribute to the genetic variation that is acted on by selection?
Two inbred lines of rice are intercrossed. In the F1, the variance in panicle weight is measured to be 12 g2. The F1 is selfed, and in the F2, the variance in panicle weight is 38 g2. Estimate the broad sense heritability of panicle weight in the F2 population of this experiment. If there is no genetic variation within a population for a given trait, what is the broad sense heritability value for the trait in the population?
What does P-value indicate? In statistical analysis the results for two sets of data are presented with P < 0.01 and P<0.005. What does it mean?
The frequency of the A allele is represented by p, while the a allele is represented by q. At hardy-weinburg equilibrium, what is the frequency of the Aa genotype?

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Is there a control treatment (and, if so, what is it)?
Is there any accounting for individual variation?
Is there repetition in the experiment?
What, if any, confounding variables are not addressed in the experiment?