A correlation coeffiicient of zero means two variables do not vary in a consistent way with each other. True or false?
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A correlation coeffiicient of zero means two variables do not vary in a consistent way with each other.
True or false?
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- When a correlation coefficient is statistically significant, what doyou conclude about the two variables? What do the results meanwith regard to cause and effect?What does it mean when a correlation coefficient is negative? Canyou think of examples?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.
- What information does the correlation coefficient provide about the association between two variables?If the environmental variance (VE) increases and all other variance components remainthe same, what will the effect be?a. Broad-sense heritability will decrease.b. Broad-sense heritability will increase.c. Narrow-sense heritability will increase.d. Broad-sense heritability will increase, but narrow-sense heritability will decrease.A characteristic has a narrow-sense heritability of 0.6.a. If the dominance variance (VD) increases and all other variancecomponents remain the same, what will happen to narrow-senseheritability? Will it increase, decrease, or remain the same? Explain.b. What will happen to broad-sense heritability? Explain.c. If the environmental variance (VE) increases and all other variancecomponents remain the same, what will happen to narrow-senseheritability? Explain.d. What will happen to broad-sense heritability? Explain.
- A characteristic has a narrow-sense heritability of 0.6. a. If the dominance variance (VD) increases and all other variance components remain the same, what will happen to narrow-sense heritability? Will it increase, decrease, or remain the same? Explain. b. What will happen to broad-sense heritability? Explain. c. If the environmental variance (VE) increases and all other variance components remain the same, what will happen to narrow-sense heritability? Explain.Calculate the Variance of the following data set: 10, 15, 13, 12, 14Using the data below, calculate the correlation: covariance -0.9 standard deviation(x) = 10.5 standard deviation(y) = 10.4 (calculate to 2 significant figures)
- Describe in your own words what variance measures. Then explain why the variance of both samples must be used in the calculation of a t-test (In other words, explain why we have to factor in the variance when comparing the means).For what human behaviors ,if any, are you sure that heritability would be extremely low? give at least 2-3sentences.What does the likelihood ratio mean?