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2 years ago

Right answer gets brainlist

Mathematics

1 answer:

insens350 [35]2 years ago

7 0

Answer:

31.25% of Mr. Marcum's students have more than two siblings

Step-by-step explanation:

First count the total amount of students Mr. Marcum has (number of dots on the chart) then count how many have more than two siblings.

Total: 16

>2 siblings: 5

Now divide 5 over 16 and move the decimal to the right two places to find what percent of students have more than two siblings.

5/16=0.3125

move the decimal and the answer is 31.25%

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2 years ago

The sum of 2 consecutive integers is –33. If n is the 1st integer, which equation best models the situation?

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Step-by-step explanation:

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3 years ago

Read 2 more answers

26. Students who take a statistics course are given a pre-test on the concepts and skills for the first chapter of a statistics

hjlf

The test statistic value lies to the right of the critical value. So we have sufficient evidence to reject the null hypothesis.

<h3>What are null hypotheses and alternative hypotheses?</h3>

In null hypotheses, there is no relationship between the two phenomenons under the assumption or it is not associated with the group. And in alternative hypotheses, there is a relationship between the two chosen unknowns.

Students who take a statistics course are given a pre-test on the concepts and skills for the first chapter of a statistics course.

Then they are given a post-test once the professor has concluded lecturing on the material.

Pre-test and post-test scores for 4 students in an elementary statistics class are given below.

Then we have

$\mu _d = \mu _{post} - \mu _{pre}$

Then the null hypotheses and alternative hypotheses will be

H₀: $\mu _d = 0$

Hₐ: $\mu _d > 0$

Then the test statistic will be

$\rm \overline{x} _d = \dfrac{\Sigma x_d}{n} = \dfrac{15+12+10+1}{4}\\\\\overline{x} _d = 9.5$

Then

$\rm S_d = 6.02$

The test statistic value is given by

$\rm t = \dfrac{\overline{x} _d }{\dfrac{S_d}{\sqrtn}} \\\\t = \dfrac{9.5}{\dfrac{6.02}{\sqrt4}}\\\\t = 3.16$

Since this is a right-tailed test, so the critical value is given by

$\rm t_{n-1}(\alpha ) = t_3 (0.05) = 2.353$

Since the test statistic value lies to the right of the critical value. So we have sufficient evidence to reject the null hypothesis.

Hence, we can conclude that $\mu _d > 0$ that is test scores have improved.

More about the null hypotheses and alternative hypotheses link is given below.

brainly.com/question/9504281

#SPJ1

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2 years ago

Papa john is 50 years old. His age is 2 years more than 3 times the age of jimmy John

kakasveta [241]

Jimmy John is sixteen

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3 years ago

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A city block is a square with each side measuring 98 yards. Find the length of the diagonal of the city block.

vlabodo [156]

To find the answer to this, we can use the formula for the diagonal of a square,

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3 years ago