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The amount of money college students spend each semester on textbooks is normally distributed with a mean of $195 and a standard deviation of $20. Suppose you randomly select 100 college students from this population. There would be a 68% chance that the mean (x) amount spent on textbooks would be between:
a. $191 and $199.
b. $193 and $197.
c. $175 and $215.
d. $155 and $235.
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The data are reported in thousands of dollars. The following data represent a ransom sample from the study. Compute the sample correlation coefficient r. Give a brief explanation of the meaning of this value.
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