Which of the following must be true for an estimator of a population parameter to be unbiased? А
The sampling distribution of the estimator is normal.
B
The expected value of the estimator is equal to the population parameter.
с
The sampling distribution of the estimator is the same shape as the distribution of
the population parameter.
D
The variability of the sampling distribution of the estimator is equal to the variability
of the population parameter.
E
The variability of the sampling distribution of the estimator is less than the variability
of the population parameter.

p ÷ r = tan(x)

step-by-step explanation:

given that there is a figure below shows a right triangle: a right triangle is shown with hypotenuse equal to q units and the length of the legs equal to p units and r units.

graph is missing so i will create the graph as per given information.

the angle between the legs having lengths p units and q units is y degrees. the angle between the legs having lengths r units and q units is x degrees.

now we need to find about what is p ÷ r equal to.

so we can use trigonometric ratio tan(x)=[altitude]/[base] to find the value of p ÷ r, because p is the altitude and r is the base.

p ÷ r=tan(x)

hence final answer is p ÷ r=tan(x).

the first option i believe

step-by-step explanation: