Question

AC variant of the gene ACTN3 which inhibits fast-twitch muscles and seems to be less prevalent in sprinters has been studied. A separate study1 indicated ethnic differences: Approximately 20% of a sample of Caucasians, approximately 25% of a sample of Asians, and approximately 1% of a sample of Africans had the gene variant. One variable is whether or not the gene variant is present and the other is which of the three ethnic groups the individual belongs to.

Answer 1

Answer:

Category variable: Caucasians, Asians, Africans

Quantitative variable: 20%, 25%, 1%.

Explanation: The are two variables in these study. They are categorical variable and quantitative variable.

Categorical variables are variable that helps classify a given population eg race, hair colour, skin colour. Most of the time are not numerical, so we can't multiply, add or subtract them. As given in this assignment the Caucasians, Asians and Africans are category variables.

Quantitative variables are those that numerical and they reflect count, percentages(20%, 25%, 1%) and can be added, subtracted, or multiplied. The percentage of the ethnic group is an example of quantitative variable.