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3 years ago

Type in the number that will complete the sentence.

Mathematics

2 answers:

Kipish [7]3 years ago

7 0

Answer:

127 pages.

Step-by-step explanation:

254 divided by 2 equals 127.

jeyben [28]3 years ago

3 0

Answer:

He has read 127 pages.

Step-by-step explanation:

one-half=1/2

1/2(254)=254/2=127

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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

7 0

2 years ago

Need help please can someone figure it out

babunello [35]

Answer:

It's the first choice.

Step-by-step explanation:

Using system of equations.

6 0

3 years ago

HELP FAST PLZ

AURORKA [14]

Answer:

Step-by-step explanation:

How much would the mortgage payment be on a $500K house? Assuming you have a 20% down payment ($100,000), your total mortgage on a $500,000 home would be $400,000. For a 30-year fixed mortgage with a 3.5% interest rate, you would be looking at a $1,796 monthly payment.

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4 years ago

64.0085 nearest hundredth

Leto [7]

64.01 I think that is the answer

3 0

3 years ago

Prove that the number A= [tex]20^{8^{2014} } }+113 is composite

Drupady [299]

Cheese proof:

We can just prove that it is divisible by 3, which means that it is composite. We can use modular exponentiation, where if $a \equiv b \pmod{n}$ then $a^x \equiv b^x \pmod{n}$ . In this case, ${-1}^{8^{2014}} \equiv 20^{8^{2014}} \pmod{3}$ . This is much easier to calculate! Since $8^{2014}$ is even, $-1^{8^{2014}}=1$ , meaning that now we only need to prove that $0\equiv(1+113) \pmod{3}$ , which is obviously true.

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2 years ago