Mathematics of Data Management, Analyzing One and Two Variable Da
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Mathematics of Data Management, Analyzing One and Two Variable Data
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- The head of the production department of FPDJ Electronic Company wants to determine the relationship between the number of workers who assemble a particular electronic gadget and the number of units of that product assembled per day. Referring to the table below, what is the coefficient of correlationA Pearson correlation of r = -0.85 indicates that a graph of the data would show __________. Group of answer choices points widely scattered around a line that slopes down to the right points clustered close to a line that slopes down to the right points clustered close to a line that slopes up to the right points widely scattered around a line that slopes up to the rightA researcher calculates a correlation coefficient of -.38 for a sample of youths age 5 through 18 for the relationship between “age of the individual” and “number of crimes committed in the last 30 days.” The researcher then collects a sample of adults who are between the ages of 18 and 35 and calculates the correlation coefficient on the same two variables and concludes that the correlation coefficient is .42. Using these pieces of information, draw the relationship below.
- For a correlation of -.64 between X and Y, each 1-SD change in corresponds to a predicted change of _______________ SD in .The ages (in years) of 10 men and their systolic blood pressures (in millimeters of mercury) are shown in the attached data table with a sample correlation coefficient r of 0.920 Remove the data entry for the man who is 50 years old and has a systolic blood pressure of 198 millimeters of mercury from the data set and find the new correlation coefficient. Describe how this affects the correlation coefficient r. Use technology. Age,_x Systolic_blood_pressure,_y16 10825 12238 14445 13450 19863 18372 19932 13158 17722 119 The new correlation coefficient r ____going from 0.920 to ____ (Round to three decimal places as needed.) .Suppose a friend of yours computes a correlation coefficient of +1.10 and comes to you for advice as to how to interpret it. What would you tell your friend?
- For a pearson correlation of r=-.85, a graph of the data should show _________ a) points widely scattered around a line that slopes upward to the right b) points widely scattered around a line that slopes downward to the right c) points clustered close to a line that sloped upward to the right d) points clustered close to a line that slopes downward to the right B is incorrectFind the line of best fit for the ordered pairs 11, 52 and13, 82. What is the correlation coefficient for these data?Why is this result reasonable?In order to indicate a strong negative correlation between variables, the correlation coefficient will be near 0 Greater than or equal to 0.7 near -10 Less than or equal to -0.7 or greater than or equal to 0.7 Less than or equal to -0.7 near 10 near 1/2
