HSCI 390 -Biostatistics lead to high blood pressure, stroke, heart failure, kidn

Question

HSCI 390 -Biostatistics lead to high blood pressure, stroke, heart failure, kidney disease, and other c can ailments. For a healthy diet, we should be consuming less than 2300monic daily. Americans consume, on average, 3400 mg of sodium with a 400 mg. Assume sodium intake is normally distributed in the po 4 A recent poll found that 9 out of 10 Americans consume too much sodiu pulation. What a. A normal intake of sodium (Le, less than 2300 mg of sodium)? b Over 2300 mg of sodium? c. Between 2300 and 3300 mg of sodium? d. Between 3300 and 4000 mg of sodium? be the Over 4000 mg of sodium? Do you agree with the poll's statistic (9 out of 10) on America's overconsumption of sodium? Justify your answer. e.

Explanation / Answer

Data given:

Mean, m = 3400

Standard Deviation, S = 400

(a)

Calculating z-score:

z = (X-m)/S = (2300-3400)/400 = -2.75

The corresponding p-value is:

p = 0.00298

So the reqd percentage = 0.298%

(b)

Reqd percentage = 100-0.298 = 99.702%

(c)

Calculating z-score:

z = (X-m)/S = (3300-3400)/400 = -0.25

The corresponding p-value is:

p = 0.401

So the reqd percentage = 40.1-0.298 = 39.802%

(d)

Reqd percentage = 100-40.1 = 59.9%

Hope this helps !

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