Biostats

Homework 8: Page 1

Lab 8 Homework For this homework problem, we will be using the “HSCI390.sav” data file from the lab. A) A new publication by the CDC recommends that the ideal body mass index (BMI) score is 20.0. You wish to determine if there is a statistically significant difference between the mean BMI of our sample (HSCI390.sav) and the ideal level established by the CDC.

*Careful, the sample includes two different measurements of BMI. You will need to make sure you are analyzing the correct variable (Hint: continuous vs. qualitative measurements).

1. State your research question:

2. State your hypotheses:

3. Decision-rule (Based on your degrees of freedom, what is your critical-t)?

4. What is your calculated t value?

5. What is your decision (at alpha level 0.05)

6. Interpret your results: Include the p-value and an interpretation of the confidence

interval.