# Designing a research study/Self-check assessment

Use the following quiz questions to check your understanding of simple linear regression. Note that as soon as you have indicated your response, the question is scored and feedback is provided. As feedback is provided for each option, you may find it useful to try all of the responses (both correct and incorrect) to read the feedback, as a way to better understand the concept.

#### Matching

Hospital floors are usually covered by bare tiles. Carpets would cut down on noise but might be more likely to harbor germs. To study this possibility, investigators randomly assigned 8 of 16 available hospital rooms to have carpet installed. The others were left bare. Later, air from each room was pumped over a dish of agar. The dish was incubated for a fixed period, and the number of bacteria colonies were counted.^{[10]}

Match the terms in column A with the study elements in column B.

A | B |
---|---|

experimental units | the 8 rooms with bare "uncarpeted" floors |

treatment group | the 16 hospital rooms |

control group | the number of bacteria colonies in a dish |

response | the 8 carpeted rooms |

## Notes

- ↑ Question adapted from Ebook Problems EDA IntroDesign, Problem 11 in Probability and Statistics EBook, from UCLA Statistics Online Computational Resource (SOCR), Retrieved 14 October 2012.
- ↑ Question adapted from Ebook Problems EDA IntroDesign, Problem 31 in Probability and Statistics EBook, from UCLA Statistics Online Computational Resource (SOCR), Retrieved 14 October 2012.
- ↑ Question adapted from Ebook Problems EDA IntroDesign, Problem 19 in Probability and Statistics EBook, from UCLA Statistics Online Computational Resource (SOCR), Retrieved 14 October 2012.
- ↑ Question adapted from Ebook Problems EDA IntroDesign, Problem 20 in Probability and Statistics EBook, from UCLA Statistics Online Computational Resource (SOCR), Retrieved 14 October 2012.
- ↑ Question adapted from Ebook Problems EDA IntroDesign, Problem 22 in Probability and Statistics EBook, from UCLA Statistics Online Computational Resource (SOCR), Retrieved 14 October 2012.
- ↑ Adapted from Experimental Designs at Online Statistics Education: An Interactive Multimedia Course of Study. Project Leader: David M. Lane, Rice University. Retrieved 14 October 2012.
- ↑ Adapted from Experimental Designs at Online Statistics Education: An Interactive Multimedia Course of Study. Project Leader: David M. Lane, Rice University. Retrieved 14 October 2012.
- ↑ Question adapted from Ebook Problems EDA IntroDesign, Problem 10 in Probability and Statistics EBook, from UCLA Statistics Online Computational Resource (SOCR), Retrieved 14 October 2012.
- ↑ Question adapted from Ebook Problems EDA IntroDesign, Problem 2 in Probability and Statistics EBook, from UCLA Statistics Online Computational Resource (SOCR), Retrieved 14 October 2012.
- ↑ Question adapted from Ebook Problems EDA IntroDesign, Problems 6-8 in Probability and Statistics EBook, from UCLA Statistics Online Computational Resource (SOCR), Retrieved 14 October 2012.