The INTERSALT study investigators collected standardized data on timed 24-hour u

Question

The INTERSALT study investigators collected standardized data on timed 24-hour urinary excreation for 10,079 men and women from 52 population samples in 32 countries (Brown et al.). One of the goals of the INTERSALT study was to quantify the relationship between 24-hour urinary Na (y) and estimated 24-hour urinary Na (x) obtained from casual urine specimens at one point in time. The investigators presented a simple linear regression of y on x, separately for men and women. The regression equation for men was: Y =1.03x - 7.19, with R2 = 0.27, n =1369

11.29) What does the regression coefficient for casual potassium (-0.13) mean in words?

Explanation / Answer

Regression coefficient is the slope of the linear regression line.

For casual potassium, its value has been given as -0.13.

The -ve value tells that y and x are negatively related, which means that if x is increased y will decrease and vice versa.

The magnitude tells about the size of effect x has on y. Since 0.13 is a small value, this means x doesn't have a very strong effect on output variable y.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.