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SVEN [57.7K]
2 years ago
9

PLEASE HELP!!!!

Mathematics
1 answer:
jasenka [17]2 years ago
7 0

Answer:

they are 2

Step-by-step explanation:

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weqwewe [10]

Answer:

c

Step-by-step explanation:

The period is 1 complete cycle of the wave, before repeating.

1 cycle is from - 6 to - 2 , then

period = 4  → c

7 0
2 years ago
A United Nations report shows the mean family income for Mexican migrants to the United States is $27,000 per year. A FLOC (Farm
disa [49]

Answer:

We conclude that the mean family income for Mexican migrants to the United States is $27,000 per year and the provided information is consistent with the United Nations report.

Step-by-step explanation:

We are given that a United Nations report shows the mean family income for Mexican migrants to the United States is $27,000 per year.

A FLOC  evaluation of 25 Mexican family units reveals a mean to be $30,000 with a sample standard deviation of $10,000.

Let \mu = <em><u>true mean family income for Mexican migrants.</u></em>

So, Null Hypothesis, H_0 : \mu = $27,000     {means that the mean family income for Mexican migrants to the United States is $27,000 per year}

Alternate Hypothesis, H_A : \mu \neq $27,000     {means that the mean family income for Mexican migrants to the United States is different from $27,000 per year}

The test statistics that would be used here <u>One-sample t test statistics</u> as we don't know about the population standard deviation;

                          T.S. =  \frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }  ~ t_n_-_1

where, \bar X = sample mean family income = $30,000

            s = sample standard deviation = $10,000

            n = sample of Mexican family = 25

So, <u><em>the test statistics</em></u>  =  \frac{30,000-27,000}{\frac{10,000}{\sqrt{25} } }  ~ t_2_4

                                     =  1.50

The value of t test statistics is 1.50.

Since, in the question we are not given the level of significance so we assume it to be 5%. <u>Now, at 5% significance level the t table gives critical values of -2.064 and 2.064 at 24 degree of freedom for two-tailed test.</u>

Since our test statistic lies within the range of critical values of t, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which <u>we fail to reject our null hypothesis</u>.

Therefore, we conclude that the mean family income for Mexican migrants to the United States is $27,000 per year and the provided information is consistent with the United Nations report.

4 0
3 years ago
Which values are solutions to the inequality below? . . Check all that apply.. . x2 &gt; 49. .
Marianna [84]
   
x^2 \ \textgreater \  49 \\  \\ &#10;x_{1,2} =  \pm \sqrt{49}  = \pm 7 \\  \\ &#10;\boxed{x \in (-\infty, ~-7)\bigcup (7,~ +\infty) }



6 0
3 years ago
Read 2 more answers
Can someone help me with this question? pls
Ivenika [448]

Answer:

See attachment

Step-by-step explanation:

See attachment

6 0
2 years ago
54:56
aivan3 [116]

Answer:

String

2.

4

6

Percussion

5

10

15

Step-by-step explanation:

6 0
3 years ago
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