Question

TOTVOL: Total Brain Volume (cm3) WEIGHT: Body Weight (kg) 1079 61.236 1104 79.38 1439 99.792 1029...

TOTVOL: Total Brain Volume (cm3) WEIGHT: Body Weight (kg)
1079 61.236
1104 79.38
1439 99.792
1029 81.648
1160 72.576
1173 61.236
1067 83.916
1347 97.524
1100 88.452
1204 79.38
1005 57.607
1035 64.184
1281 63.958
1051 133.358
1034 62.143
963 58.968
1027 58.514
1272 61.69
1079 107.503
1070 83.009

Open Brain data. SETUP: It is believed that the heavier the person (i.e. larger weight) the larger the brain volume should be. Given the data your job is to confirm or disprove this assertion.

1. What test/procedure did you perform?

  • a. One-sided t-test
  • b. Two-sided t-test
  • c. Regression
  • d. ​​Confidence interval

2. What is the P-value/margin of error?

  • a. 0.379045702
  • b. 3.44547E-20
  • c. 5.27739E-08
  • d. ​​6.89095E-20
  • e. ​​None of these

3. Statistical interpretation

  • a. Since P-value is very large we cannot confirm that the average of the first sample is larger than the other.
  • b. Since P-value is very small we are very confident that the averages are different.
  • c. Since P-value is very small we are confident that the slope of regression line is not zero.
  • d. ​​None of these.

4. Conclusion

  • a. Yes, I am confident that the above assertion is correct.
  • b. No, we cannot claim that the above assertion is correct.
Math   Statistics-And-Probability   
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Homework Answers

Answer #1

1) We will perform REGRESSION

OPTION C

2)  the P-value is 0.379045702

OPTION A

3) None of these

4) No, we cannot claim that the above assertion is correct.

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