A researcher was interested in examining the effects of the amount of caffeine intake during the day on the quality of participants’ sleep quality of 50 male, sophomores at USF who were randomly selected. Quality of sleep was measured using an actigraphy and amount of caffeine was measured using a self-reported food diary. What effect would using 50 male, sophomores at USF have on internal validity?

A researcher examined the body mass index (BMI) of 1000 randomly selected undergraduates from USF and found a mean of 18 and a standard deviation of negative 0. 05 (SD=-0.05). What is your interpretation of the standard deviation of -0.05?

Briefly define what is meant by the internal validity of a research design.

7 undergraduate students were randomly selected and asked to complete a questionnaire that asked how many total marathons (26.2 miles or 42.16 kilometers) they had completed. The results were: 7, 0, 0, 0, 2, 1, 4 What is the variance for the number of marathons?  

In a Normal Distribution, what would be your percentile rank, if you were 2 standard deviations below the mean?  

Triplet base codes found in mRNA that code for different amino acids during protein synthesis are called ___________________.

Gene______________ is the process of turning genes on and off.

In prokaryotes, 100% of protein synthesis occurs in the nucleus. True or False?

____________ are changes in the nucleotide sequence of DNA.

In which phase of mitosis does the genetic material first appear as CHROMOSOMES instead of chromatin?