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SpyIntel [72]
2 years ago
7

Could you guys please help me with this :3

Mathematics
1 answer:
Ivenika [448]2 years ago
3 0
Total is $18.72 so the shopper would need to buy 6 of the 8 packs!!!
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Find the appropriate rejection regions for the large-sample test statistic z in these cases. (Round your answers to two decimal
Usimov [2.4K]

Answer:

a) We have that the significance is given by \alpha =0.01 and we know that we have a right tailed test.

So for this case we need to look in the normal standard dsitribution a critical value that accumulates 1% of the area on the right and 99% of the area on the left. This value can be founded with the following excel code:

"=NORM.INV(1-0.01,0,1)"

And we got for this case z_{crit}=2.33

So then the rejection region would be z>2.33

b) We have that the significance is given by \alpha =0.05, \alpha/2 =0.025 and we know that we have a two tailed test.

So for this case we need to look in the normal standard dsitribution a critical value that accumulates 2.5% of the area on the right and 97.5% of the area on the left. This value can be founded with the following excel code:

"=NORM.INV(1-0.025,0,1)"

And we got for this case z_{crit}=\pm 1.96

So then the rejection region would be z>1.96 \cup z

Step-by-step explanation:

Part a

We have that the significance is given by \alpha =0.01 and we know that we have a right tailed test.

So for this case we need to look in the normal standard dsitribution a critical value that accumulates 1% of the area on the right and 99% of the area on the left. This value can be founded with the following excel code:

"=NORM.INV(1-0.01,0,1)"

And we got for this case z_{crit}=2.33

So then the rejection region would be z>2.33

Part b

We have that the significance is given by \alpha =0.05, \alpha/2 =0.025 and we know that we have a two tailed test.

So for this case we need to look in the normal standard dsitribution a critical value that accumulates 2.5% of the area on the right and 97.5% of the area on the left. This value can be founded with the following excel code:

"=NORM.INV(1-0.025,0,1)"

And we got for this case z_{crit}=\pm 1.96

So then the rejection region would be z>1.96 \cup z

7 0
3 years ago
Find x <br> 3x+1=2x-2<br> show all work pls
spayn [35]
See attached photo:

8 0
3 years ago
Read 2 more answers
The square below represents a unit or a whole. What fraction is represented by the
Mkey [24]
20/28 or 10/14 or 5/7
You can keep reducing until both sides of the fraction can't be divided by the same number anymore.
5 0
2 years ago
A water skiing jump is 4.6m long. It rises 1.1m. What
lorasvet [3.4K]

The inclination to the nearest tenth of a degree exists 0.24146

<h3>What is the inclination to the nearest tenth of a degree?</h3>

The given scenario includes a right-angled triangle where the length of the ramp exists hypotenuse and the rise of ramp exists the perpendicular.

Given: H = 4.6 m and P = 1.1 m

We have to use the trigonometric ratios to find the angle. The ratio that has to be used should involve both perpendicular and hypotenuse

Let x be the angle then

sin x = P/H

sin x = 1.1/4.6

sin x = 0.23913

$$sin^{-1} x = 0.24146

The inclination to the nearest tenth of a degree exists 0.24146

To learn more about trigonometric ratios refer to:

brainly.com/question/14033725

#SPJ9

4 0
11 months ago
Use the substitution method to solve the system of equations. Choose the correct ordered pair. x + y = 11 -x = -y - 9
suter [353]
x+y=11 \\&#10;-x=-y-9 \\ \\&#10;\hbox{substitute the second equation by -1} \\ \\&#10;x+y=11 \\&#10;x=y+9 \\ \\&#10;\hbox{substitute y+9 for x in the first equation} \\ \\&#10;y+9+y=11 \\&#10;2y=11-9 \\&#10;2y=2 \\&#10;y=\frac{2}{2} \\&#10;y=1 \\ \\&#10;x=y+9 \\&#10;x=1+9 \\&#10;x=10 \\ \\&#10;(x,y)=(10,1)

The answer is B.
5 0
2 years ago
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