Question

A diet high in potassium appears to protect teenagers from high blood pressure in adulthood, while a low-salt diet has no effect, according to new research. A new study tracked the eating habits and blood pressure of 2,185 nine and ten year-old girls for almost 10 years. The study found that sodium intake had no long-term effect on the girls’ blood pressure. However, they did find that girls who ate diets high in potassium throughout adolescence had lower blood pressure than girls who ate fewer potassium-rich foods.

If the researchers wanted to compare blood pressure for the sample of girls across two different time periods, which statistical test would they use?

a.

Dependent t-test

b.

Independent t-test

c.

One-sample t-test

d.

One-sample z-test

e.

One-way ANOVA test

f.

Pearson correlation test

Answer 1

Answer:

· A diet high in potassium appears to protect teenagers from high blood pressure in adulthood, while a low-salt diet has no effect, according to new research. A new study tracked the eating habits and blood pressure of 2,185 nine and ten year-old girls for almost 10 years. The study found that sodium intake had no long-term effect on the girls’ blood pressure. However, they did find that girls who ate diets high in potassium throughout adolescence had lower blood pressure than girls who ate fewer potassium-rich foods.

If the researchers wanted to compare blood pressure for the sample of girls across two different time periods, which statistical test would they use?

a.

Dependent t-test

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