3 years ago

Need some help here please

Mathematics

1 answer:

Anika [276]3 years ago

8 0

Answer:

Step-by-step explanation:

y/x: 30/3 = 50/5 = 70/7 = 10

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Sales at a fast-food restaurant average $6,000 per day. The restaurant decided to introduce an advertising campaign to increase

Akimi4 [234]

Answer:

The value of the test statistic is 2.8.

Step-by-step explanation:

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value expected value for the population mean, $\sigma$ is the standard deviation and n is the size of the sample.

Sales at a fast-food restaurant average $6,000 per day

This means that $\mu = 6000$

Sample of 49

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This means that $X = 6400$

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This means that $\sigma = 1000$

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$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

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$z = 2.8$

The value of the test statistic is 2.8.

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3 years ago