In order to estimate the average electric usage per month, a sample of 36 houses was selected and the electric usage was determined. Assume a population standard deviation of 330 kilowatt-hours. Find the standard error of the mean.

Step-by-step explanation:

standard error of the mean. is expressed mathematically as;

is the standard deviation

n is the sample size

Given

Required

Standard error of the mean SM

Substitute the given parameters into the formula shown;

Hence the standard error of the mean is 55.

93.8

step-by-step explanation:

lets say, first number = x

second number = 3x+7

total = 49

(x)+(3x+7)= 49

4x+7 = 49

4x = 42

x = 42/4

x= 10.5

x= 10.5

3x+7 = 3(10.5)+7 = 93.8

hope this

q1 a person or thing situated away or detached from the main body or system. a cluster is a a mash of many things.

q2 do

step-by-step explanation: