Mrs. Martinez has a bowl of candy that she passes out to trick-or-treaters. A group of 5 children dressed in costumes comes to h
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Answer:
the 90% of confidence intervals for the average salary of a CFA charter holder
(1,63,775 , 1,80,000)
Step-by-step explanation:
<u>Explanation</u>:-
random sample of n = 49 recent charter holders
mean of sample (x⁻) = $172,000
standard deviation of sample( S) = $35,000
Level of significance α= 1.645
<u> 90% confidence interval</u>
on calculation , we get
(1,63,775 , 1,80,000)
The mean value lies between the 90% of confidence intervals
(1,63,775 , 1,80,000)
Let us assume total cost of the TV is = $x
Sarah pays a 20%.
So, the remaining % would be 100-20 = 80%.
Therefore, we can say that Sarah pays extra $96 is the 80% of x.
Let us repharse the problem now.
"80% of x is 96".
So, we can setup an equation.
80% of x = 96.
80% in decimal form can be written as 80/100 = 0.80.
Therefore, 0.80x = 96.
Dividing both sides by 0.80, we get
x =
x=120.
Therefore, total cost is $120.