Professor Sands Studies the Relationship Between the Number of Minutes

Professor Sands studies the relationship between the number of minutes that an adolescent spends text messaging each semester and his/her grades in school.She found a correlation of +.60.What can we conclude from this report?

A) Text messaging results in lower grades for adolescents.
B) Text messaging has no effect on grades for adolescents.
C) Text messaging and academic grades are related in adolescents.
D) The more an adolescent text messages,the higher his or her grades.

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