A random sample is made of 256 middle managers concerning their annual incomes. The sample mean is computed to be $35,420. If the population standard deviation is $2,050. What is the standard error of the mean? a. $128.125
b. $138.36
c. $2.050
d. $8.01

a. $128.125

Step-by-step explanation:

The standard error of the mean is given by :

, where = population standard deviation , n= sample size.

Given:

n= 256

Then, the standard error of the mean:-

Hence, option a. is correct.

idk

step-by-step explanation:

x=-2

infinite number of lines, so there is an infinite number of equations.

step-by-step explanation:

there are an infinite number of line that passes through the point (-2,5)

x=-2   is one line that passes through the point

y = 5 is another line that passes through the point

(these two lines are perpendicular to each other).

since the number of   numbers are infinite and the slope is the ratio of two numbers,(change in y over change in x) we can have an infinite number of slopes.     our only condition is that it passes through the point (-2,5)