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➳ B. Strong positiveHOW?
-ˏˋ 胃miichaella ˊˎ -A scatter plot can be used for data in the form of ordered pairs of numbers. The result will be a bunch of points "scattered" around the plane. If the general tendency is for the points to rise from the left to the right of the graph, then we say there is a positive correlation between the two variables measured. If the points tend to fall from the left to the right of the graph, we say there is negative correlation . If there is no general tendency, then there is no correlation . If the tendency is not very pronounced – that is, the points are scattered widely – then we say the variables are weakly correlated . If the correlation is more pronounced, we say the variables are strongly correlated .
Examples: If you graphed a person's height on one axis and their weight on the other, you would probably get a strong positive correlation (because taller people generally weigh more). If you graphed a man's age and the number of hairs on his head, you would probably get a weak negative correlation (because some men have a tendency for baldness as they get older). If you graphed a woman's shoe size and the length of her hair, you would probably get no correlation. (These variables are unrelated.) Notes This preview shows page 317 - 319 out of 398 pages. 1.If the points on the scatter graph follow a trend of rising from right to left,how will you describe the correlation of the variables involved?A.moderateC. positiveB.negativeD. zero2.Joan noticed that the value of one variable corresponds to either low or highvalue of the second variable of a set of bivariate data.What conclusion can you draw from the direction of correlation?A.The variables have positive correlation.B.The variables have negative correlation.C.The variables have moderate correlation.D.The variables have zero correlation or negligible correlation.3.Shanks observed that the points on the scatter plot are close AROUND thetrend line. What conclusion can he draw based from the scatter plot?A.The variables have no correlation.B.The variables have strong correlation.C.The variables have perfect correlation.D.The variables have moderate correlation4.Zorro noticed that in constructing his scatter plot, the high values of onevariable correspond to low values of the second variable. What conclusioncan you draw from his data?A.There is zero correlation between the variables.B.There is a perfect correlation between the variables.C.There is a positive correlation between the variables.D.There is a negative correlation between the variables.5.If the points on the scatter graph rise from left to right, then the variableinvolved has a ______ correlation.A.moderateC. positiveB.negativeD. zero6.Joan noticed that the high value of one variable corresponds to low value ofthe second variable or low value of the first corresponds to high value ofsecond variable. What conclusion can you draw from the direction ofcorrelation?317 808590950102030405060A.The variables have zero correlation.B.The variables have positive correlation.C.The variables have negative correlation.D.The variables have moderate correlation.8. Zorro noticed that there is a direct relationship between the variables hecollected. What conclusion can you draw from his data?A.There is zero correlation between the variables.B.There is a perfect correlation between the variables.C.There is a positive correlation between the variables.D.There is a negative correlation between the variables.9.The strength of the correlation is associated with the ______ of the points toaround the trend line on a scatter plot.A.closenessC. formB.directionD. number10. If the points on the scatter plot fall almost on the trend line, then thevariables are said to have _______ correlation.A.negativeC.positiveB.perfectD. strong11. Noah noticed that the points on the scatter plot follow a trend of rising fromright to left. He also noticed that the points are scattered moderately fromthe trend line. What is the correlation of the variables involved?A.strong negativeC. weak negativeB.strong positiveD. weak positive7. Given the scatter plot below, describe the variation of correlation of thevariables involved. Upload your study docs or become a Course Hero member to access this document Upload your study docs or become a Course Hero member to access this document End of preview. Want to read all 398 pages? Upload your study docs or become a Course Hero member to access this document Tags Null hypothesis, Statistical hypothesis testing, researcher, Type I and type II errors How can you identify the independent and dependent variables in a scatterplot?Every graph has two variables – an independent variable that is typically graphed on the x-axis and a dependent variable that is typically graphed on the y-axis. An independent variable is the controlled variable. This is what changes naturally, or what the person manipulating the experiment or graph changes.
What does it mean when the scatter plot is scattered?If the points on the scatter plot seem to form a line that slants down from left to right, there is a negative relationship or negative correlation between the variables. If the points on the scatter plot seem to be scattered randomly, there is no relationship or no correlation between the variables.
What is positive correlation in scatter graphs?We often see patterns or relationships in scatterplots. When the y variable tends to increase as the x variable increases, we say there is a positive correlation between the variables. When the y variable tends to decrease as the x variable increases, we say there is a negative correlation between the variables.
How do you describe the relationship of a scatter plot?A scatterplot shows the relationship between two quantitative variables measured for the same individuals. The values of one variable appear on the horizontal axis, and the values of the other variable appear on the vertical axis. Each individual in the data appears as a point on the graph.
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If the points on the scatter graph rise from left to right then the variables involved have a
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