Which of the following descriptions of correlation is correct?
Group of answer choices
a) Correlation equals causation
b) When we are looking at differences between two groups, we should use correlation
c) Correlation can be analyzed with only one variable
d) Correlation means there are some relationships between two variables
Right answer- d) Correlation means there are some relationships between two variables
Explanation-In the field of statistical analysis we often use the term Correlation which indicates some relation between the variables. This relationship can be positive or negative but a correlation always identifies the relationship between the variables. So we can say here the rights answer d.
Which of the following descriptions of correlation is correct? Group of answer choices a) Correlation equals...
Which of the following statements about any two stocks is correct? Group of answer choices a. Diversification benefits can be achieved as long as the two stocks have a correlation less than one. b. Diversification benefits can be achieved only when their correlation is less than zero. c. Diversification benefits can be achieved only when their correlation is negative one. d. Diversification benefits can always be achieved between two assets.
Correlation coefficient tells you: Group of answer choices: which variable causes a change in another variable if there is a difference between groups nothing important the strength and nature of the relationship between two variables
Which of the following is NOT a characteristic of ANOVA? Group of answer choices It can only be used with two groups It often required hoc tests to identify location of the differences The F statistic is used to report results. It tests for differences between means
Correlation: Correlation Does Not Mean Causation One of the major misconceptions about correlation is that a relationship between two variables means causation; that is, one variable causes changes in the other variable. There is a particular tendency to make this causal error, when the two variables seem to be related to each other. What is one instance where you have seen correlation misinterpreted as causation? Please describe.
Match the correct kind of statistical test for the data described Options for answers: Dependent T-test, Independent T-test, correlation, one-way ANOVA, and two-way ANOVA 1. You are assessing the amount of linear relationship between two continuous variables. 2. You are assessing differences in the averages for two categorical variables. 3. You are looking for group differences on one categorical variable that has more than two groups 4. You are looking for differences in the averages between two groups. 5. You...
Which of the following is FALSE about Correlations: We can use the Pearson Correlation Coefficient when both variables are measured on an interval or ratio scale A correlation examines the relation between two variables The Pearson Correlation Coefficient describes the relation between two variables in terms of the strength and direction of the relationship. A correlation implies causation
Which of the following statements is correct? Group of answer choices The sample mean is an unbiased estimator of the population mean. The sample proportion is an unbiased estimator of the population proportion. The difference between two sample means is an unbiased estimator of the difference between two population means. All of these choices are true.
Which of the following statements about experiments is true? Group of answer choices None of these is true. All experiments must have a control group. Random assignment is only critical for treatment groups, as opposed to control groups. Matching can be used in any experiment to eliminate lurking variables. Blocking is employed to reduce variation.
1. A global variable is a variable that’s defined Group of answer choices within any block of code within any function outside of any function within a header file 2. Which of the following is/are differences between value variables and reference variables? Group of answer choices A value variable stores a copy of a value in memory, and a reference variable refers to a value that already exists in memory. Changing the value of a value variable doesn’t change the...
which of the following is correct, when we have pure serial correlation in a regression? 12 Multiple Choice ) we can use first differencing model only if the serial correlation is first order. 0 the error terms of the first differnced model are not serially correlated. ) if the first differenced method is applied correctly, the coefficients of the regression are unbiased and efficient O All of the above choices are correct