yesterday , Elsa had K baseball cards today she gave 12 away ,using K write an expression for the number of cards elsa has left
2 answers:
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Answer:
c
Step-by-step explanation:
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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 = <em><u>true mean family income for Mexican migrants.</u></em>
So, Null Hypothesis, :
= $27,000 {means that the mean family income for Mexican migrants to the United States is $27,000 per year}
Alternate Hypothesis, :
$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. = ~
where, = 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> = ~
= 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.
The label could be written in the area marked X as "Uses a convex eyepiece lens". Then the correct option is D.
<h3>What are Sets?</h3>Sets are the collection of well-defined elements. A set is represented by a capital letter symbol and the number of elements in the finite set is shown as curly bracket {..}.
<h3>What is the Venn diagram?</h3>It is the representation of the sets by the diagram. And shows the condition that is generated between them by the overlapping of the circle.
Shanti began to draw a Venn diagram comparing refracting and reflecting telescopes. The two overlapping circles.
The left circle is labeled Refracting telescopes.
The right circle is labeled Reflecting Telescopes.
An X in the overlap. Both as a label below and outside the overlap.
From the figure, we can say that the label could be written in the area marked X as "Uses a convex eyepiece lens".
Then the correct option is D.
More about the set link is given below.
