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aleksklad [387]
3 years ago
14

A health and fitness club surveys 40 randomly selected members and found that the average weight of those questioned is 157 lb.

Is this average an example of a statistic or a parameter?
A) Parameter
B) Statistic
Mathematics
1 answer:
svp [43]3 years ago
6 0

Answer:

B. Statistic

Step-by-step explanation:

The average weight of those questioned which is 157 lb. from the survey of 40 randomly selected member of a health and fitness club is an example of a statistic.

It is a calculated numerical value that characterises some aspects of a sample set of data.

Statistic refers to a numerical piece of information that uses quantified models, representations and synopses for a given set of a study. Statistic is used to to estimate the true value of a parameter in a population.

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Given system of equation:
y=-1/5x +1 Equation 1
y=x+4 Equation 2
Substitute value of y in equation 2.
x+4=-1/5x+1
Multiply both sides by 5.
5x+20=-x+5
Add x to both sides
6x+20=5
Subtract 20 from both sides
6x=-15
x=-15/6
x=-5/2
Now substitute value of x in equation 1.
y=-1/5 ( -5/2) +1
y=1/2+1
y=3/2

Solution is (x,y)= (-5/2 , 3/2)
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