Listed below are heights (in.) of fathers and their first sons. The data are from a journal kept by Francis Galton. (See Data Set 10 “Family Heights” in Appendix B.) Use a 0.05 significance level to test the claim that there is no difference in heights between fathers and their first sons. 

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Data Set 10: Family Heights FATHER 70.0 71.0 69.0 69.5 70.0 MOTHER 64.0 65.5 63.5 66.0 58.0 FIRST SON 68.0 72.0 70.5 71.0 72.0 FIRST DAUGHTER 65.0 66.0 65.0 66.5 66.0