If a researcher is interested in the correlation between sex (male/female) and political party (republican/democrat), which of the following analyses would be appropriate? a. Pearson correlation b. Phi-coefficient c. Spearman correlation d. Point-biserial correlation   A negative correlation indicates a “bad” correlation. a. True b. False   For the linear equation Y = (0.75)X + 11, what is the predicted value of Y, when X=4? a. 11 b. 14 c. 0.75 d. Cannot be determined

Q: If the Pearson correlation (r=0.9) this means that: Select one: a. 81% of the dependent variable…

A: The coefficient of determination signifies the total variation in Y(the response variable) accounted…

Q: In an area of the Great Plains, records were kept on the relationship between the rainfall (in…

A: Solution:- Given data  x y xy x2 y2 8.1 45.5 368.55 65.61 2070.25 6.4 41.2 263.68 40.96…

Q: a. What are the independent and dependent variables? b. Draw a scatter plot. c. Use regression to…

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Q: If y=3.2-7.9x, the correlation between x and y must be negative. Select one: O True False

A: It is given that  y^ = 3.2 - 7.9x

Q: Which of the following Pearson correlations shows the greatest strength or consistency of…

A: Solution Given Pearson correlations shows the greatest strength or consistency of relationship?

Q: Given the supply of a commodity, x, and the price of a commodity, y, would you expect a positive…

A: The supply of a commodity is directly related to its price. If a price of a good increase, the…

Q: Identify the true statements about the correlation coefficient,  ?. A correlation coefficient of…

A: The symbol r stands for the correlation coefficient for samples, whereas the Greek letter rho stands…

Q: What does a negative correlation coefficient indicate?   A. No relationship between variables B.…

A: A negative correlation coefficient indicates that as one variable increases, the other variable…

Q: If you run a correlation between two variables that are typically associated, such as sleep and…

A: Correlation is the degree or extent of linear relationship between two variables.

Q: a. Based on the scatterplot, is there a positive or negative association between height of athlete…

A: From the given scatter plot, it is evident that there is an upward trend in the data, which means…

Q: What are the units of the correlation coefficient for these data?

A: Here given ,  Tail-feather length in birds is sometimes a sexually dimorphic trait. That is, the…

Q: Which of the following interpretations of correlation is false? 1.Correlation is useful in deciding…

A: Solution Correlation measures the linear relationship between the variables.

Q: When interpreting a correlation coefficient of 0.34, you would say that there is a linear…

A: Based on the r value, we can consider whether the linear relationship between two variables are weak…

Q: Which of the following Pearson correlations shows the greatest strength or consistency of…

A: Pearson correlations are given.

Q: Calculate the equation of the LSRL. Round the slope & y-intercept to 2 decimal places. B . What is…

A: Given, the percentage of females in the US labor force at various times throughout the history The…

Q: Which of the following measures the direction of the linear relationship between two variables but…

A: coefficient of variation It is a standardized dispersion measure of the distribution of probability.

Q: A value of r close to 0 indicates what type of linear correlation between the two variables?   a.…

A: A value of r close to 0 indicates that either variables have no correlation or weak correlation.

Q: What type of relationship exists between the two variables x and y in the scatter plot? A.Positive…

A: What type of relationship exists between the two variables x and y in the scatter plot?

Q: The correlation coefficient (r) measures O how many data points are shown on a scatterplot. O…

A: Solution :-

Q: What type of correlation is exhibited by the following graph?

A: Consider the given graph. The given graph is a scatterplot. A scatterplot is a plot in which two…

Q: (i) the value of the correlation coefficient (ii) the lines of regression. (iii) Estimate the age of…

A: It is widely used in statistics . It is an intrinsic part of regression analysis . Here we have…

Q: Which of the following Pearson correlations indicates that the data point would be clustered most…

A: Postive correlation  When the value of one variable increase with increase in another variable then…

Q: 4. Which of the following values of r indicates the strongest correlation? .82 O.361

A: Correlation quantifies the strength of the relationship between 2 variables. The direction of the…

Q: Which of the following statements is sensible? A 102.4% of the total variation in a football…

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Q: What type of relationship or correlation would exist between the following two variables: Size of a…

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Q: Which of the following correlation coefficients indicate the strongest relationship between two…

A: The correlation coefficient is used to find the direction and magnitude of two quantitative…

Q: Cigarette Tar and Nicotine The table below lists measured amounts (mg) of tar, carbon monoxide (CO),…

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Q: What is the correct interpretation for the correlation coefficient r=0? No relationship exists…

A: The relation between the two variables is called correlation coefficient (r). The value of r is…

Q: As temperature decreases, rates of crime also seem to decrease. Which of the following Pearsons R…

A: The range of correlation coefficient lies between -1 and 1. When the correlation between two…

Q: In a regression calculation, a researcher finds that the explanatory variable x has a mean 100 and…

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Q: After gathering data about the number of starfish and measuring the pollution in areas of the ocean…

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Q: Determine which plot shows the strongest linear correlation.

A: # From the given scattere plot between variable x and y .then to determine which plot represent str

Q: Which of the following Pearson correlations shows the greatest strength or consistency of…

A: Which of the following Pearson correlations shows the greatest strength or consistency of…