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3 years ago

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Jamie had 4 fith of a spool of twin.He then used half of a spool of twin to make freindship knots.Heclaims to have 3 tenth of th

e original spool of twin left over. Explain how u know whether Jamie's claim is resonable.

1 answer:

Rom4ik [11]3 years ago

6 0

Jamie's claim isn't reasonable. This is because half of 4/5 is 4/10 and if you simplify it, it is 2/5.

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A high school runs a survey asking students if they participate in sports. The results are found below. Run an independence test

Sveta_85 [38]

Answer:

It can be concluded that participation in sports is dependent on grade level.

Step-by-step explanation:

In this case a Chi-square independence test for the data is to be performed at <em>α </em>= 0.01.

The hypothesis can be defined as follows:

H₀: The participation in sports is independent of grade level.

<em>Hₐ</em>: The participation in sports is dependent of grade level.

The data provided is:

Freshmen Sophomores Juniors Seniors

Yes 75 88 55 42

No 30 28 38 40

The formula to compute the expected frequencies is:

$E_{i}=\frac{i^{th}\ \text{Row Total}\ \times\ i^{th}\ \text{Column Total}}{N}$

The Chi-square statistic is:

$\chi^{2}=\sum {\frac{(O_{i}-E_{i})^{2}}{E_{i}}}$

Consider the Excel file attached below.

The value of Chi-square statistic is 16.244.

The degrees of freedom of the test are:

$\text{df}=(r-1)(c-1)$

$=(4-1)(2-1)\\=3\times 1\\=3$

Compute the <em>p</em>-value of the test as follows:

$p-value=P(\chi^{2}_{df}$

$=P(\chi^{2}_{3}$

*Use a Chi-square table.

<em>p</em>-value = 0.001 < <em>α</em> = 0.01

The null hypothesis will be rejected at 1% level of significance.

Thus, it can be concluded that participation in sports is dependent on grade level.

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4 years ago

David goes into a candy store with $5.00.

maksim [4K]

He can buy 14 lemon heads

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3 years ago

What expression can be used to add 1/2 plus 5/6

Vlad [161]

You can add the two fractions by turning 1/2 and 5/6 to have the same denominator.

Turn 1/2 into a fraction with a denominator of 6.
It would equal 3/6

5/6+ 3/6= 8/6

That simplifies to 1 1/3.

Hope this helps you!

Brainliest answer is always appreciated!

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Answer:

square roots of:

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The answer would end up being 68.

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