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yanalaym [24]
3 years ago
5

Marna is playing a game where you score -5 points each time you guess the correct answer. The goal is to get the lowest score. T

o win the game, Marna must have a score less than -80 points. How many correct answers does Marna need to win the game? Write an inequality.
Mathematics
1 answer:
Mice21 [21]3 years ago
7 0
74 points she would have to answer.
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Answer:

The value of the test statistic is t = 1.97

Step-by-step explanation:

The null hypothesis is:

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The alternate hypotesis is:

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Our test statistic is:

t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the null hypothesis value, \sigma is the standard deviation and n is the size of the sample.

In this problem:

X = 251.6, \mu = 250, \sigma = 5.4, n = 44

So

t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

t = \frac{251.6 - 250}{\frac{5.4}{\sqrt{44}}}

t = 1.97

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