If 8x + 6 = 3x + 21,

Mathematics

1 answer:

spin [16.1K]3 years ago

4 0

Answer:

x = 3

Step-by-step explanation:

First, subtract 3x from both sides. That leaves 5x+6=21.

Next, subtract 6 from both sides. That leaves 5x=15.

Lastly, divide by 5 and you get x=3

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LekaFEV [45]

Answer:

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Step-by-step explanation:

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3 years ago

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Dmitry [639]

The chi-squared test statistic will be 3.11. The test statistic is contrasted with a predicted value based on the Chi-square distribution.

<h3>What is the chi-squared test statistic?</h3>

Finding the squared difference between the actual and anticipated data values, then dividing that difference by the expected data values, constitutes the test statistic.

The formula for the chi-squared test statistic is;

$\sum \frac{(O_i-E_i)^2}{E_i } \\\\$

Where,

$\rm O_i$ is the observed value

$\rm E_i$ is the expected value

The chi-square test statics is;

$\rm( \frac{18-18}{18} )^2 +( \frac{14-18}{18} )^2 + (\frac{24-18}{18} )^2+( \frac{16-18}{18} )^2 \\\\ 0+ \frac{16}{18}+ \frac{36}{18} +\frac{4}{18}\\\\ \frac{56}{18} \\\\ 3.11$