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Troyanec [42]
3 years ago
9

1. If = 1, = −2 = −1 then find the value of the following

Mathematics
1 answer:
Mariana [72]3 years ago
5 0

Answer:

hope its helpful......

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A random sample of 87 eighth grade students’ scores on a national mathematics assessment
Finger [1]

There is not enough evidence to support the administrator’s claim and the true mean is not significantly greater than 280.

<h3>What is a statistical hypothesis?</h3>

A hypothesis to test the given parameters requires that we determine if the mean score of the eighth graders is more than 283, thus:

The null hypothesis:

\mathbf{H_o \leq 283}

The alternative hypothesis:

\mathbf{H_i > 283}

From the population deviation, the Z test for the true mean can be computed as:

\mathbf{Z = \dfrac{\hat X - \mu _o}{\dfrac{\sigma}{\sqrt{n}}}}

\mathbf{Z = \dfrac{283 -280}{\dfrac{37}{\sqrt{87}}}}

Z = 0.756

Note that, since we are carrying out a right-tailed test, the p-value for the test statistics is expressed as follows:

P(z > 0.756)

P = 0.225

Since the P-value is greater than the significance level at α = 0.14, we can conclude that there is not enough evidence to support the administrator’s claim and the true mean is not significantly greater than 280.

Learn more about hypothesis testing here:
brainly.com/question/16251072

#SPJ1

8 0
1 year ago
Tell whether the angles are complementary or supplementary. Then find the value of x.
zubka84 [21]
I hope this helps you

8 0
3 years ago
Watcha help me now now nkw
Valentin [98]

Answer:

que mal

no te ayudare

por culpa de brailyn

Step-by-step explanation:

culpables

BRAILYN

CULPABLES

BUUUUUUUUU

FUERAAA MODERADORES

BUUUUUUUUUU

3 0
2 years ago
May you help me with this question please
Lostsunrise [7]

Answer:

<em>Option C</em>

Step-by-step explanation:

Consider each of these graphs. Let us formulate an inequality for each of them, and match the one with an inequality of x > - 14.5;

Graph 1, x > 13.5\\Graph 2, x \geq 14\\Graph 3, x > 14.5\\Graph 4, x \geq 15

Graph 3 is the only one that matches with the inequality provided to us.

* Note that shaded circles are represented by a greater / less than or equal to, and non - shaded circles are represented by a greater / less than sign.

<em>Solution ⇒ Graph 3</em>

5 0
3 years ago
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Solve for x in the equation x2 - 8x+41 - 0
Liula [17]

Answer:

x= 4+5i

Step-by-step explanation:

7 0
3 years ago
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