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3 years ago

Solve the equation. -45 = x +(-3) + 50 a2 b-92 c-98 d8

Mathematics

2 answers:

GaryK [48]3 years ago

3 0

B- 92 because you just combined like terms on sides and solve for x.

iren2701 [21]3 years ago

3 0

-45 = x +(-3) + 50
(Combine like terms)
-45 = x + 47
(Subtract 47 from both sides)
-92 = x

Answer: b. -92

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$\mu=35\\n=23\\\=x=33\\s=5\\\alpha=0.1$

1. Null and alternative hypothesis

$H_{0}:\mu=35\\H_{1}:\mu$

2. Significance level

$\alpha=0.1\\1-\alpha=0.99$

Freedom degrees is given by:

$v=n-1\\v=23-1=22$

For a sgnificance level of 0,01 and 22 freedom degrees, t-student distribution value is:

$t_{0.01;23}=-2. 5083$

3. Test statistic

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In this case, we have an one left tailed analysis, it means that null hypothesis is rejected if $t$

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Conclusion:

It is not enough evidence to reject null hypothesis. It is not enough evidence to say that mean score is not equal to 35.

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