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tamaranim1 [39]
3 years ago
8

.......................

Mathematics
1 answer:
sergey [27]3 years ago
5 0

Answer:

B.

Step-by-step explanation:

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How do i convert 37/4 into mixed numbers
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So as a mixed number would be 9 whole number, 1/4

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The garden shown at right is divided into two section by a fence. If the quadrilateral section is a square, what is the square a
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The area of the triangle is 24 ft² while the area of the square is 64 ft²

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An equation is an expression that shows the relationship between two or more numbers and variables.

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3 years ago
Phonics is an instructional method in which children are taught to connect sounds with letters or groups of letters. A sample of
Fantom [35]

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A 90% confidence interval for the mean number of letter sounds identified in one minute is: (30.84, 37.34).

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.05 = 0.95, so Z = 1.645.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

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M = 1.645\frac{23.44}{\sqrt{141}}

M = 3.25

The lower end of the interval is the sample mean subtracted by M. So it is 34.09 - 3.25 = 30.84.

The upper end of the interval is the sample mean added to M. So it is 34.09 + 3.25 = 37.34.

A 90% confidence interval for the mean number of letter sounds identified in one minute is: (30.84, 37.34).

6 0
3 years ago
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