Answer:
0.427
Step-by-step explanation:
Standard error for the sampling distribution refers to the standard deviation of the samples taken from a population. The standard error equals the standard deviation divided by the square root of the sample size
The probability of customers who drink tea (p) = 24% = 0.24, the sample size of customers (n) = 300.
Standard error =
where σ is the standard deviation.

Standard error =
That is an ratio, what are you asking for??
Answer:
but where is the graph to show the x or the equation
the average rate of change in the closed interval [ a , b ] is
( f(b) - f(a)))/(b - a)
f(b) = f(3) = 3² + 3(3) = 9 + 9 = 18
f(a) = f(-2) =(-2)² + 3(-2) = 4 - 6 = - 2
= (18 - (-2))/(3 - (-2)) =20/5 = 4