Answer:
Option A) a population and a parameter.
Step-by-step explanation:
Sample and Population:
- Population is the collection of all the possible observations of an event.
- A sample is a part of population and always smaller than the population.
- A sample is a subset of the population.
Statistic and parameter:
- Any numerical value that may define a property of the sample is known as the statistic.
- Any numerical value that may describe a population is know as parameter.
The relationship between a sample and a statistic is the same as the relationship between
Option A) a population and a parameter.
Answer:
P(20≤x≤35) = 0.75 .
Step-by-step explanation:
We know that the probability distribution function of Uniform Distribution is represented as :
If x follows Uniform(c,d) then,
f(x) =
where c < x < d
<em>To fond the given probability it is better to first calculate the Cumulative Distribution Function(CDF) of Uniform Distribution.</em>
The CDF of Uniform Distribution is P(X<=x) =
where d > c .
Therefore, P(20<=x<=35) = P(x<=35) - P(x<20)
P(x<=35) =
because we are given c = 20 and d = 40.
=
= 0.75
P(x<20) =
=
= 0
Hence, P(20<=x<=35) = 0.75 - 0 = 0.75.
BC/DC = 8/3.2 = 2.5
AB/BD = 12.5/5 = 2.5
AC/BC = 20/8 = 2.5
Since the results are all 2.5, this means that the triangles are similar triangles.
The justification you would use is the SSS similarity theorem.
SSS = side side side