Obtaining significant interactions guarantees that ALL of the main effects will statistically significant as well. Group of answer choices True False
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Obtaining significant interactions guarantees that ALL of the main effects will statistically significant as well. Group of answer choices True False
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- Population Genetics In the study of population genetics, an important measure of inbreeding is the proportion of homozygous genotypesthat is, instances in which the two alleles carried at a particular site on an individuals chromosomes are both the same. For population in which blood-related individual mate, them is a higher than expected frequency of homozygous individuals. Examples of such populations include endangered or rare species, selectively bred breeds, and isolated populations. in general. the frequency of homozygous children from mating of blood-related parents is greater than that for children from unrelated parents Measured over a large number of generations, the proportion of heterozygous genotypesthat is, nonhomozygous genotypeschanges by a constant factor 1 from generation to generation. The factor 1 is a number between 0 and 1. If 1=0.75, for example then the proportion of heterozygous individuals in the population decreases by 25 in each generation In this case, after 10 generations, the proportion of heterozygous individuals in the population decreases by 94.37, since 0.7510=0.0563, or 5.63. In other words, 94.37 of the population is homozygous. For specific types of matings, the proportion of heterozygous genotypes can be related to that of previous generations and is found from an equation. For mating between siblings 1 can be determined as the largest value of for which 2=12+14. This equation comes from carefully accounting for the genotypes for the present generation the 2 term in terms of those previous two generations represented by for the parents generation and by the constant term of the grandparents generation. a Find both solutions to the quadratic equation above and identify which is 1 use a horizontal span of 1 to 1 in this exercise and the following exercise. b After 5 generations, what proportion of the population will be homozygous? c After 20 generations, what proportion of the population will be homozygous?When a person's score on one variable is used to make predictions about a person's score on another variable, the procedure is called _________. Select one: a. hypothesis testing b. prediction / regression c. data transformation d. correlationRebecca (a clinical dietician) wants to compare two different diets: the “egg a day” diet, and the “apple a day” diet, and measure the amount of blood glucose that is released in her diabetic patients’ blood after consuming these foods. She hypothesises that there will be a difference in her patients’ blood glucose level after consuming an egg compared to consuming an apple. Rebecca’s colleague had previously found a large effect size (according to Cohen’s conventions) when they compared groups who had consumed these types of foods. Rebecca is interested to know the likelihood of her detecting the same large effect between her diet groups (n=20), and the number of participants she will need in each group in order to obtain a power of .95. The effect size is Q1.. The statistical effect is Q2.. If Q3. is false, Rebecca has a Q4. chance of detecting a difference in the amount of blood glucose level between her two diet groups with a sample of 40 (20 in each group). In order for Rebecca…
- Rebecca (a clinical dietician) wants to compare two different diets: the "egg a day" diet, and the "apple a day" diet, and measure the amount of blood glucose that is released in her diabetic patients' blood after consuming these foods. She hypothesises that there will be a difference in her patients' blood glucose level after consuming an egg compared to consuming an apple. Rebecca's colleague had previously found a large effect size (according to Cohen's conventions) when they compared groups who had consumed these types of foods. Rebecca is interested to know the likelihood of her detecting the same large effect between her diet groups (n=20), and the number of participants she will need in each group in order to obtain a power of .95. The effect size is Q1. ABCD. The statistical effect is Q2. ABCD. If Q3. ABCD is false, Rebecca has a Q4. ABCD chance of detecting a difference in the amount of blood glucose level between her two diet groups with a sample of 40 (20 in each group). In…Gender difference in basketball shooting ability being due to the size of the ball is a case of: a interaction effect of experimental treatment. b interaction effect of testing. c reactive effects of experimental setting. d multiple-treatment interference.Rock Sparrows. Rock Sparrows breeding in northern Italy are the subject of a long-term ecology and conservation study due to their wide variety of breeding patterns. Both males and females have a yellow patch on their breasts that is thought to play a significant role in their sexual behavior. A. Pilastro et al. conducted an experiment in which they increased or reduced the size of a female’s breast patch by dying feathers at the edge of a patch and then observed several characteristics of the behavior of the male. Their results were published in the paper “Male Rock Sparrows Adjust Their Breeding Strategy According to Female Ornamentation: Parental or Mating Investment?” (Animal Behaviour,Vol. 66, Issue 2, pp. 265–271). Eight mating pairs were observed in each of three groups: a reduced-patch-size group, a control group, and an enlarged-patch-size group. The data on the WeissStats site, based on the results reported by the researchers, give the number of minutes per hour that males…
- What is interaction? Provide an example about the design of a study that involves the examination of an interaction effect.Neurosurgery Operative Times. An Arizona State University professor, R. Jacobowitz, Ph.D., in consultation with G. Vishteh, M.D., and other neurosurgeons obtained data on operative times, in minutes, for both a dynamic system (Z-plate) and a static system (ALPS plate). They wanted to perform a hypothesis test to decide whether the mean operative time is less with the dynamic system than with the static system. a. identify the variable. b. identify the two populations. c. determine the null and alternative hypotheses. d. classify the hypothesis test as two tailed, left tailed, or right tailed.What benefit does conducting an experiment to prove that free coffee causes more frequent shoe purchases have beyond determining cause and effect? An experiment allows the researcher to include as many variables as possible in the experiment . An experiment allows the researcher to cross -check that their observations are correct . This type of study allows a researcher to employ a case study research design . An experiment allows the researcher to eliminate the effects of confounding variables
