Answer:
x = 400 when y = 100
Step-by-step explanation:
This is a question in relation to direct variation.
y ∝
y = k
Given that, y = 45, x = 81. Then;
45 = k
45 = 9k
k =
k = 5
Thus the relationship among the variables is;
y = 5
If y = 100, then;
100 = 5
=
= 20
x =
x = 400
Therefore, x = 400 when y = 100.
Answer: ($141,775, $158,225)
Step-by-step explanation:
Given : Significance level :
Critical value :
Sample size : n= 49
Sample mean :
Standard deviation :
The confidence interval for population mean is given by :_
Hence,he 90% confidence interval for the average salary of a CFA charter-holder = ($141,775, $158,225)