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balandron [24]
3 years ago
13

The owner of a computer repair shop has determined that their dailyrevenue has mean $7200 and standard deviation $1200. The dail

yrevenue totals for the next 30 days will be monitored. What is the probability that the mean daily revenue for the next 30 days willexceed $7500?
Mathematics
1 answer:
meriva3 years ago
7 0

Answer:

The required probability is 0.0855

Step-by-step explanation:

Consider the provided information.

The daily revenue has mean $7200 and standard deviation $1200.

\mu_{\bar x}=7200

\sigma=1200

The daily revenue totals for the next 30 days will be monitored.

\sigma_{\bar x}=\frac{\sigma}{\sqrt{n}}

\sigma_{\bar x}=\frac{1200}{\sqrt{30}}=219.089

As we know Z=\frac{\bar x-\mu_{\bar x}}{\sigma_{\bar x}}

Substitute \bar x=7500, \mu_{\bar x}=7200\ and\ \sigma_{\bar x}=219.089 in above formula.

Z=\frac{7500-7200}{219.089}=1.3693

From the standard normal table P( Z >1.3693) = 0.0855

Hence, the required probability is 0.0855

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