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2 years ago

Help please I really need it

Mathematics

2 answers:

IceJOKER [234]2 years ago

7 0

Answer:

Its the first one

Step-by-step explanation:

insens350 [35]2 years ago

5 0

Answer:

Step-by-step explanation:

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A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean isx⎯ ⎯ x¯ = 840 and

gayaneshka [121]

Answer:

$(832.156, \ 847.844)$

Step-by-step explanation:

Given data :

Sample standard deviation, s = 15

Sample mean, $\overline x = 840$

n = 23

a). 98% confidence interval

$\overline x \pm t_{(n-1, \alpha /2)}. \frac{s}{\sqrt{n}}$

$$E= t_{( n-1, \alpha/2 )} \frac{s}{\sqrt n}}$

$t_{(n-1 , \alpha/2)} \frac{s}{\sqrt n}$

$t_{(n-1, a\pha/2)}=t_{(22,0.01)} = 2.508$

∴ $E = 2.508 \times \frac{15}{\sqrt{23}}$

$E = 7.844$

So, 98% CI is

$(\overline x - E, \overline x + E)$

$(840-7.844 , \ 840+7.844)$

$(832.156, \ 847.844)$

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2 years ago

Professional ethics can best be defined by what? 1 Rules of right living 2 Reflective decision-making 3 Rules promulgated by pro

arsen [322]

Answer:

Step-by-step explanation:

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3 years ago

SOMEONE PLS HELP ME!!!

Andrews [41]

The axis of symmetry is a line that splits a graph into two mirror images. For a parabola, the axis of symmetry goes through the vertex and is a vertical line.

The axis of symmetry for this graph is x = -1.

Hope this helps!! :)

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2 years ago

The area of a circle is represented by the equation A=πr2, where r is the radius. The area is 64π m2.

NeX [460]

The length of the diameter is:

16 metres

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3 years ago

5/4- square root of 3

ss7ja [257]

5/4 - square root of 3 = -0.48

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3 years ago