Respuesta :
Answer:
The number of games must a store sell in order to be eligible for a reward is 135.
Step-by-step explanation:
Let the random variable X represent the number of video games sold in a month by the sores.
The random variable X has a mean of, μ = 132 and a standard deviation of, σ = 9.
It is provided that the company is looking to reward stores that are selling in the top 7%.
That is, [tex]P (\bar X > \bar x) = 0.07[/tex].
The z-score related to this probability is, z = 1.48.
Compute the number of games must a store sell in order to be eligible for a reward as follows:
[tex]z=\frac{\bar x-\mu}{\sigma/\sqrt{n}}[/tex]
[tex]\bar x=\mu+z\cdot \sigma/\sqrt{n}[/tex]
[tex]=132+1.48\times (9/\sqrt{36})\\\\=132+2.22\\\\=134.22\\\\\approx 135[/tex]
Thus, the number of games must a store sell in order to be eligible for a reward is 135.