A graduate student i n developmental psychology believes t here m ay b e a relationship between birth weight and subsequent I Q. S he randomly samples seven psychology majors at her university and gives them an IQ test. Next she obtains the weight at birth of t he seven majors from the appropriate hospitals (after obtaining permission from t he students, o f course). The data are shown in the following table.
a. Construct a scatter plot of the data, plotting birth weight on the X axis and IQ on the Y axis. Does the relationship appear to be linear?
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b. Assume the relationship is linear and compute the value of Pearson r. developmental