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Vaselesa [24]
2 years ago
9

A random sample of size 21 was taken from a normal population. the sample average was 9.87 and the sample sd was 1.17. at the si

gnificance level of 10%, what test should you use for testing whether the population mean equals 9.7?
Mathematics
1 answer:
Olin [163]2 years ago
6 0
You should be using a hypothesis test - One sample T test.   

The answer is given below.  

Test of mu = 9.7 vs not = 9.7  

The assumed standard deviation = 1.17    

N Mean SE Mean 90% CI Z P  

21 9.87000 0.25531 (9.45004, 10.28996) 0.67 0.506  

since P value is greater than 0.05 we accept the null hypothesis that the population mean equals 9.7
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Natali5045456 [20]
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Hope this helps!
5 0
3 years ago
Solve the system by substitution.
kirill [66]
<h2>Answer:</h2>

x = 1

y = 1

<h3>Step-by-step explanation:</h3>

y=-3x+4\\ y=x

Substitute into one of the equations

-3x+4=x

Rearrange variables to the left sider of the equation

-3x-x=-4

Combine like terms

-4x=-4

Divide both sides of the equation by the coefficient of variable

x=\frac{-4}{-4}

Determine the sign for multiplication or division

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Cross out the common factor

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Substitute into one of the equations

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The solution of the system is

\left \{ {{x=1} \atop {y=1}} \right.

<em>I hope this helps you</em>

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8 0
2 years ago
A square pyramid has a height of 6 units and a volume of 70 units3. If a square prism has the same base area and volume as the s
inysia [295]

Answer:

The height is 2 units

Step-by-step explanation:

Find the area of the base of the square pyramid

we know that

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V=\frac{1}{3}BH

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we have

H=6\ units

V=70\ units^{3}

substitute in the formula and solve for B

70=\frac{1}{3}B(6)

B=70/2=35\ units^{2}

step 2

Find the height of the square prism

we know that

The volume of the square prism is equal to

V=Bh

where

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we have

B=35\ units^{2}

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substitute in the formula and solve for h

70=(35)h

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3 0
3 years ago
Read 2 more answers
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STatiana [176]

Answer:

A

Step-by-step explanation:

Because when a decimal is only one number after a zero, it equals ten of whatever number it is. Since 60 is greater than 41 it is -0.6 ( -0.60 ) has more negative value than -0.41.

5 0
3 years ago
a farmer examinea sample of 25 egg cartons and finds three cracked eggs whast the best predictions of the number of cartons with
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It's C because 500/25 = 20 and 20x3=60
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3 years ago
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