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Ne4ueva [31]
2 years ago
8

Matematicas

Mathematics
1 answer:
Minchanka [31]2 years ago
3 0

Answer:

B

Step-by-step explanation: edge

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A toy manufacturer wants to know how many new toys children buy each year. A sample of 601 children was taken to study their pur
Lilit [14]

Answer:

The confidence interval is 6.6<μ<6.8.

Step-by-step explanation:

We have:

Number of observations = 601

Mean = 6.7

Standard deviation σ = 1.5

The z-score for a 95% confidence interval is 1.96.

The limits of the confidence interval can be calculated as

X \pm z*\frac{\sigma}{\sqrt{n}}\\\\LL=X-z*\frac{\sigma}{\sqrt{n}}=6.7-1.96*\frac{1.5}{\sqrt{601} } =6.7-0.1199=6.6\\\\UL=X+z*\frac{\sigma}{\sqrt{n}}=6.7+1.96*\frac{1.5}{\sqrt{601} } =6.7+0.1199=6.8

The confidence interval is 6.6<μ<6.8.

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3 years ago
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PolarNik [594]

Answer: It should be 1/2, 50% or 0.5

Step-by-step explanation: There are only two different things you can get when flipping the coin, so it would be 1/2

4 0
3 years ago
-17 + 5x = 5(x - 5) + 8<br> i need step by step solution pls asap
Masja [62]

Answer:just subtract 8 from both sids then add 17 to both then do the dam probkemits ez

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What is the answer to 14x-7=133?
e-lub [12.9K]

Answer:

x = 10

Step-by-step explanation:

Given

14x - 7 = 133 ( add 7 to both sides )

14x = 140 ( divide both sides by 14 )

x = 10

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32, 64)

O (2-4)

0 (-2,-4)

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