An educator wants to determine whether early exposure to schoolwill affect IQ. He enlists the aid of the parents of 12 pairs ofpreschool-age identical twins who agree to let their twinsparticipate in his experiment. One member of each twin pair isenrolled in preschool for 2 years, while the other member of eachpair remains at home. At the end of the 2 years, the IQs of all thechildren are measured. Â
- Research Hypothesis:
- Null Hypothesis:
- Statistical test to use:
- Degrees of freedom
- Using α = .05 significance level.
Critical value = ________________ Test statistic =________________
IQ
                                   Twinsat                                 Twins at
Pair                            Preschool                               Home
  1                                 120                                       114
  2                                 121                                       118
  3                                 127                                       103
  4                                 117                                       112
  5                                 115                                       117
  6                                 120                                     106
  7                                 130                                       115
  8                                 119                                       113
  9                                 121                                       109
10Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 120Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 112
11Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 117Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 116
12Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 121Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 104
Please help. Show all steps with answers and formulas used.
