Tickets to a play cost $4 in advance and $5 at the door. The theater club president wants to raise at least $400 from the ticket
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Using the <u>normal probability distribution and the central limit theorem</u>, it is found that:
a) There is a 0.1922 = 19.22% probability that Company B would charge more than Company A to deliver a small-item package.
b) The mean amount charged is of RM 51.5, with a standard deviation of 21.35.
In a normal distribution with mean and standard deviation
, the z-score of a measure X is given by:
- It measures how many standard deviations the measure is from the mean.
- After finding the z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X.
By the Central Limit Theorem:
- When a <u>fixed constant k</u> multiplies a variable, the mean is
and the standard deviation is
- When two normal variables are subtracted, the mean is the subtraction of the means, while the standard deviation is the square root of the sum of the variances.
In this question, b is needed to solve a, so I am going to place the solution to item b first.
Item b:
Flat fee of RM20(not considered for the standard deviation), plus a variable fee of RM3.5, hence:
The mean amount charged is of RM 51.5, with a standard deviation of 21.35.
Item a:
This probability is . For the distribution, we have that:
Since A has a constant fee, it's standard deviation is 0, hence:
The probability is <u>1 subtracted by the p-value of Z when X = 0</u>, so:
has a p-value of 0.8078.
1 - 0.8078 = 0.1922.
0.1922 = 19.22% probability that Company B would charge more than Company A to deliver a small-item package.
A similar problem is given at brainly.com/question/25403659
The graph of the parent function is well -known (see attached diagram for details, green curve).
Make such transformations:
- translate graph of parent function
3 units to the left (violet curve), then you obtain the function
- compress function
in the x-direction by multiplying x by 3 (black curve), then you get the function
- reflect the function
across the line
(red curve). You get the function
- translate the function
1 unit down (blue curve) to get the function
