SAT Score No Siblings	SAT Score With Siblings	Change in SAT Score (di)
455	420	35
639	565	74
554	632	-78
439	427	12
367	495	-128
437	469	-32
531	459	72
602	493	109
536	410	126
692	694	-2
609	435	174
575	648	-73
550	418	132
644	580	64
541	535	6
625	590	35
542	599	-57
573	650	-77
550	554	-4
632	673	-41

In Born togetherReared apart: the Landmark Minnesota twin study (2012), Nancy Segal discusses the efforts of research psychologists at the University of Minnesota to understand similarities and differences between twins by studying sets of twins who were raised separately. The Excel Online file below contains critical reading SAT scores for several pairs of identical twins (twins who share all of their genes), one of whom was raised in a family with no other children (no siblings) and one of whom was raised in a family with other children (with siblings). Construct a spreadsheet to answer the following questions.

Part b

The 90% confidence interval

C.I.Lower Limit

C.I.Upper Limit

Part c

Degrees of Freedom

Test statistic

p-value

Significance Level (Alpha) 0.01