A researcher obtains a negative value for chi-square statistic. What can you conclude because the value is negative?

Mathematics

1 answer:

den301095 [7]3 years ago

4 0

Answer:

The researcher has made a mistake chi-square statistic can never be negative

Step-by-step explanation:

Pearson's chi-squared test

$\sum_{i=1}^kp_i=1$

$\sum_{i=1}^km_i=n\sum_{i=1}^kp_i=\sum_{i=1}^kx_i$

$\chi^2=\sum_{i=1}^k\frac{(x_i-m_i)^2}{m_i}=\sum_{i=1}^k\frac{x_i^2}{m_i}-n$

Where

$x_i$ = Observed numbers

n = Number of observations

k = Mutually exclusive classes

$p_i$ = Probability of events

$m_i=np_i$

So, the value of χ² can never be negative otherwise χ value will be an imaginary number.

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Triangle R Q S is cut by line segment T U. Line segment T U goes from side Q R to side Q S. The length of Q T is 32, the length

Marizza181 [45]

The statement that is true is option A that is Line segment TU is parallel to line segment RS because StartFraction 32 Over 36 EndFraction = StartFraction 40 Over 45 EndFraction.

<h3>What is the line segment about?</h3>

The law of the side- splitter connote that when f the line is parallel to a side of the triangle and if that said line do intersects the other 2 sides, tt is said to divides those given sides proportionally.

So the converse means that when the sides are proportional so therefore, the side TU is said to be parallel to the side RS.

Thus;

$\frac{QT}{TR}$ = $\frac{32}{36} = \frac{8}{9}\\\\ \\$

$\\\frac{QU}{US} =\frac{40}{45} = \frac{8}{9}\\$

Therefore, the ratios are equal and as such TU is parallel to RS

Hence, The statement that is true is option A that is Line segment TU is parallel to line segment RS because StartFraction 32 Over 36 EndFraction = StartFraction 40 Over 45 EndFraction.

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brainly.com/question/2437195

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