Answer:
Option B) data from the sample is used to estimate the population parameter
Step-by-step explanation:
Point estimation:
- Its is the process of getting a point estimate from a sample that describes a population parameter in the best way.
- We calculate the unknown population parameter with the help of a sample drawn from the population.
- It is similar to interval estimation.
- In interval estimation we obtain an interval in which the population parameter may lie but in point estimation we obtain a single value which is the best approximation of population parameter.
Thus, the correct answer is
Option B) data from the sample is used to estimate the population parameter
2(3a+8) I used photo math, and it gave me a step by step. The top steps are factor the expressions (20a+4)-(14a-12), which is (4(5a+1)-2(7a-6)
Answer:
90
Step-by-step explanation:
i think
Using the fact that cos is 2π-periodic, we have
That is, 
for any 
and integer 
.
We get 2 solutions in the interval [0, 2π] for 
and 
,
