2 years ago

Help i need to show my work too

Mathematics

2 answers:

ehidna [41]2 years ago

7 0

Bethany: 3 hours=20miles

susan: 3 hours=18 miles

Anettt [7]2 years ago

4 0

Susan goes 7.5 miles per hour.
Bethany goes 5 miles per hour.
Susan is faster.

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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

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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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enot [183]

Answer:

Step-by-step explanation:

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2 years ago

You have been saving $25 a week to make the trip; you now have $200. This money will be budgeted to include gas, food, and enter

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1 year ago

An animal shelter has a ratio of cats to dogs that is 9 to 7. If the shelter has 18 cats, how many dogs would it have?

madreJ [45]

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Step-by-step explanation:

Given

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