How do a parameter and a statistic differ? Choose the correct answer below.
1 answer:
Answer:
B.
Step-by-step explanation:
A parameter is a summary measure computed to describe a characteristic of the population and it involves the measurement of all in the population numerically/quantitatively. e.g Average of all the values measured in the population
A statistic is a measurement based on sample observations.
Examples of statistics constructed from a random sample : [
(a) max
(b) Average of the observed values
(c) Range = max - min
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Given:
To find:
The value of a and PQ.
Solution:
We have,
(CPCTC)
So,
Isolating variable terms, we get
Divide both sides by -2.
Now,
Therefore, the value of a is 8 and the value of PQ is 28.
The measure of the ∠Q = 41°
By law of cosines:
a law in trigonometry: the square of a side of a plane triangle equals the sum of the squares of the remaining sides minus twice the product of those sides and the cosine of the angle between them.
Which can we stated as:
solving equation using normal algebra:
60cos(Q) = 36 + 25 - 16
60 cos(Q) = 45
cos(Q) = 45/60
cos(Q) = 3/4
Thus, Q = 41°
Hence, the measure of the smallest angle in a triangle whose sides have lengths 4, 5, and 6. ∠Q is 41°.
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