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Alexeev081 [22]
3 years ago
11

Find the sample size required to achieve the given margin of error .

Mathematics
2 answers:
jok3333 [9.3K]3 years ago
7 0

Answer:

7

Step-by-step explanation:

7

Bumek [7]3 years ago
3 0

Answer: to be honest I don’t know.

Step-by-step explanation:

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A credit reporting agency claims that the mean credit card debt in a town is greater than $3500. A random sample of the credit c
Lera25 [3.4K]

Answer:

Claim is false

Step-by-step explanation:

Claim : A credit reporting agency claims that the mean credit card debt in a town is greater than $3500.

H_0:\mu \leq 3500\\H_a:\mu = 3500

n = 20

Since n <30

So we will use t test

Formula : t =\frac{x-\mu}{\frac{s}{\sqrt{n}}}

s = standard deviation = 391

x = 3600

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t =\frac{3600-3500}{\frac{391}{\sqrt{20}}}

t =1.14

Degree of freedom = n-1 = 20-1 = 19

α=0.10

So, using t table

t_({\frac{\alpha}{2},d.f.}) = 1.72

t critical > t calculated

So we accept the null hypothesis

Hence we reject the claim that the mean credit card debt in a town is greater than $3500.

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3 years ago
Help! I give brainlest. Problem is in Image
yawa3891 [41]

Answer:

65

Step-by-step explanation:

let's place 9 in place of p and 4 in place of q. I will use a star in place of that symbol for the sake of my convenience having to look for it, apologies.

9 \star 4  = 9^2-4^2 = 81-16 = 65

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Lady_Fox [76]

Answer:

See below

Step-by-step explanation:

I'm not sure if there are any specific instructions on how these answers are supposed to be written, but here's my best shot:

1. U

2. XZ, VY

3. VU, WU

4. XY, ZY

5. ⊙U

6. XZ, VY (they are diameters but also intersect)

7. VY = 10 cm, WU = 5 cm

8. Diameter (of larger circle)

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10. Radius (of larger circle)

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