The variance of their weights is 128.87270 kg².
It is required to find the variance of their weights.
<h3>What is standard deviation ?</h3>
A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean. Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out.
Given:
Let n=sample size=10 subjects
Standard deviation=11.352211.3522 kg
Using this formula
Variance=(Standard deviation)²
By the formula we get,
Variance=(11.352211.3522 kg)²
Variance=128.87270 kg²
Therefore, the variance of their weights is 128.87270 kg².
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The correct answer is 176
To solve for Simple interest, we use the formula:
I = Principal x Rate x Time(year)
where:
I = Simple interest = ?
Principal = $2,350
Rate = Rate on Interest = 3.77% = 0.0377
Time = 15 months, we have to convert 15months to year
12 months = 1 year
15 months = ?
Cross multiply
= 15 x 1/12
= 1.25 year
The Simple interest is calculated as:
$2350 x 0.0377 x 1.25
= $110.74375
Approximately = $110.74
Therefore, the simple interest on $2,350 is $110.74
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The answer will be B.exponential
