Theory tells us that the 95% confidence interval is equal to
[Average – Margin of Error,
Average + margin of Error].
In our case the average is equal to 1632.833, thus the interval is
What is the conclusion?
(Click for answer)
Lab 9 / Task 1
In what follows use any of the following tests/procedures: Regression, confidence intervals, one-
sided t-test, or two-sided t-test. All the procedures should be done with 5% P-value or 95%
data. SETUP: It is believed that the larger the head circumference 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?
d. Confidence interval