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A Researcher Decided to Conduct an Experiment to Study the Effect

question 1

Multiple Choice

A researcher decided to conduct an experiment to study the effect of caffeine by randomly dividing nine people into two groups. Group 1, consisting of five study subjects had a cup of coffee to start the experiment. Group 2, consisting of four people, had decaffeinated coffee. The study subjects did not know which group they belonged to. All study subjects were then asked to tap their finger. The measurement taken was the number of finger taps per minute. This type of data is often skewed and the researchers decided that they should not use a two-sample t test. They chose a Wilcoxon rank sum test and recorded the ranks of the subjects in the caffeine group. The standard deviation of this test statistic is given by:

Definitions:

Protein Production

The biological process by which cells create proteins, which involves transcription of DNA to RNA and translation of RNA into polypeptide chains.

Energy Currency

ATP, or adenosine triphosphate, often referred to as the energy currency of the cell, is a molecule that transports chemical energy within cells for metabolism.

ATP

Adenosine triphosphate, a high-energy molecule that stores and transports energy within cells for metabolism.

Glycolysis

Anaerobic process during which glucose is converted to pyruvic acid; net of two ATP molecules is produced during glycolysis.