In what follows use any of the following tests: Regression, multiple regression,

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In what follows use any of the following tests: Regression, multiple regression, one-sided t-test, or two-sided t-test. All conclusions should be based on 5% P-value threshold. Choose the best fitting answer. Open Brains data. SETUP: Some people believe that second born subjects are more intelligent (higher IQ test). Given the data, your job is to perform the appropriate statistical test or procedure and help them decide. 1. What test did you perform? a. Regression b. Multiple regression c. One-sided t-test d. Two-sided t-test 2. What is the P-value? a. 0.845379076 b. 0.422689538 c. 1.93055E-18 d. 9.65275E-19 e. None of these 3. What is the Statistical interpretation? a. Since P-value is very small we can conclude that second born subjects have higher IQ. b. Since P-value is too large we cannot conclude that second born subjects have different IQ. c. Since P-value is too large we cannot conclude that second born subjects have higher IQ. d. None of these. 4. What is the conclusion? a. Test is inconclusive; thus nothing can be concluded. b. Test is inconclusive; thus we cannot claim that the IQ’s are different. c. Test is inconclusive; thus we cannot claim that there is a correlation between IQ’s and the order the subjects were born. d. None of these. DATA: CCMIDSA: Corpus Collasum Surface Area (cm2) FIQ: Full-Scale IQ HC: Head Circumference (cm) ORDER: Birth Order PAIR: Pair ID (Genotype) SEX: Sex (1=Male 2=Female) TOTSA: Total Surface Area (cm2) TOTVOL: Total Brain Volume (cm3) WEIGHT: Body Weight (kg) 8.42 96 57.2 1 6 1 1806.31 1079 61.236 7.44 88 57.2 1 7 1 2018.92 1104 79.38 6.84 85 57.2 1 8 1 2154.67 1439 99.792 6.48 97 57.2 1 9 1 1767.56 1029 81.648 6.43 124 58.5 1 10 1 1971.63 1160 72.576 7.62 101 57.2 2 6 1 1689.6 1173 61.236 6.03 93 57.2 2 7 1 2136.37 1067 83.916 6.59 94 55.8 2 8 1 1966.81 1347 97.524 7.52 114 56.5 2 9 1 1827.92 1100 88.452 7.67 113 59.2 2 10 1 1773.83 1204 79.38 6.08 96 54.7 1 1 2 1913.88 1005 57.607 5.73 87 53 1 2 2 1902.36 1035 64.184 6.22 101 57.8 1 3 2 2264.25 1281 63.958 5.8 103 56.6 1 4 2 1866.99 1051 133.358 7.99 127 53.1 1 5 2 1743.04 1034 62.143 7.99 89 54.2 2 1 2 1684.89 963 58.968 8.76 87 52.9 2 2 2 1860.24 1027 58.514 6.32 103 56.9 2 3 2 2216.4 1272 61.69 6.32 96 55.3 2 4 2 1850.64 1079 107.503 7.6 126 54.8 2 5 2 1709.3 1070 83.009

Explanation / Answer

Given the data, your job is to perform the appropriate statistical test or procedure and help them decide.

1. What test did you perform?

c. One-sided t-test

2.What is the P-value?

P-value = 0.6015

e. None of these

3. What is the Statistical interpretation?

c. Since P-value is too large we cannot conclude that second born subjects have higher IQ.

4. What is the conclusion?

d. None of these.

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