Answer:
A. Balance hormones
Explanation:
Lipids help in the balancing of hormonal activities in the body. Some hormones are lipid soluble, which means that they can get dissolved in the lipids and can be transported throughout the body.
In addition to that, every cell in the body has a cell membrane which is made up of lipids. The sex hormone of humans are made up of cholesterol which is a lipid. This makes lipids play an important role in the balancing of hormones in the body, they are necessary in the production of hormones.
From the options given, the only option which would result on having a reduced error margin, is to increase the sample size.
<u>Recall</u><u> </u><u>:</u><u> </u>
<em>Margin of Error</em> = Zcritical × σ/√n
- Increasing the mean would have no impact on the margin of error as it is not a part of the factors which affects the margin of error value.
- Increasing the standard deviation, which is the Numerator will result in an increased margin of error value.
- By raising the confidence level, the critical value of Z will increase, hence widening the margin of error.
- The sample size, n being the denominator, would reduce the value of error margin.
Hence, only the sample size will cause a decrease in the margin of error of the interval.
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