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Reika [66]
3 years ago
15

SOMEONE HELP I SUCK AT THIS MATH!

Mathematics
1 answer:
77julia77 [94]3 years ago
4 0

Answer:

0.24

Step-by-step explanation:

2.88/12=0.24

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Please Help! Multiple Choice!
Katyanochek1 [597]

Using the z-distribution, the p-value would be given as follows:

b) 0.0086.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis we test if the means are equal, hence:

H_0: \mu_D - \mu_C = 0

At the alternative hypothesis, it is tested if they are different, hence:

H_1: \mu_D - \mu_C \neq 0

<h3>What are the mean and the standard error for the distribution of differences?</h3>

For each sample, they are given as follows:

  • \mu_D = 12, s_D = \frac{5.2}{\sqrt{73}} = 0.6086
  • \mu_C = 14, s_C = \frac{4.1}{\sqrt{81}} = 0.4556

Hence, for the distribution of differences, they are given by:

  • \overline{x} = 12 - 14 = -2.
  • s = \sqrt{0.6086^2 + 0.4556^2} = 0.76

<h3>What is the test statistic?</h3>

The test statistic is given by:

z = \frac{\overline{x} - \mu}{s}

In which \mu = 0 is the value tested at the null hypothesis.

Hence:

z = \frac{\overline{x} - \mu}{s}

z = \frac{-2 - 0}{0.76}

z = -2.63.

Using a z-distribution calculator, for a two-tailed test, with z = -2.63, the p-value is of 0.0086.

Hence option B is correct.

More can be learned about the z-distribution at brainly.com/question/13873630

#SPJ1

4 0
2 years ago
Fourtine equals a divided by two
lions [1.4K]

Answer:

a=28

Step-by-step explanation:

use inverse operations

5 0
3 years ago
If b = 5, what is the value of<br>each expression?<br>10 + 7b<br>76 + 10​
Kipish [7]

Answer:

10+7b= 45

76+10=86

Step-by-step explanation:

5 0
3 years ago
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BRAINLIEST help pls,,,,,,,,,,,,,
icang [17]
Hey there!

1/3 = ?/12

If we observe denominator , it is multiplied by 4

So we must multiple numerator by 4 too

=> 1/3 x 4/4 = 4/12

? = 12.
7 0
2 years ago
Read 2 more answers
in a group of 15 people, two third of them are females, 4 of them are wearing boots. How many are not wearing boots
Mumz [18]

Answer:

6 females were not wearing boot but if your looking for how many people total aren't its 11 people that aren't

8 0
2 years ago
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