3 years ago

Why is a 99 confidence interval wider than a 95 confidence interval?

Mathematics

1 answer:

Ugo [173]3 years ago

4 0

A larger interval is wider than a smaller interval.

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Assume the annual day care cost per child is normally distributed with a mean of $9000 and a standard deviation of $1000. What

Tpy6a [65]

Answer:

65.54% (nearest hundredth)

Step-by-step explanation:

Given:

$\sf \mu=9000$

$\sf \sigma=1000$

$\sf X \sim N(\mu, \sigma^2)\implies X \sim N(9000,1000^2)$

P(X > 8600) = 1 - P(X ≤ 8600)

= 1 - 0.3445782584

= 0.6554217416

= 65.54%

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2 years ago

There are four times as many girls in a chemistry class as there are boys. if there are 45 students in the class, how many boys

puteri [66]

In order to determine the number of boys in the class, first, we set-up an algebraic equation. Let x = number of boys in the class. The equation is then: x + 4x = 45. This is because the number of girls is 4 times greater than the number of boys. After solving the algebraic equation, it is then determined that there are 9 boys in the Chemistry class.

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3 years ago

Select the correct answer.

Molodets [167]

Answer:

to discuss Shays's Rebellion in Massachusetts

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Question 3 of 10

Aleks [24]

C=+3 since your adding three more onto four

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7. A hotelier conducted a survey of guests staying at her hotel. The table shows some

jonny [76]

Answer:

here's the solution :-

Step-by-step explanation:

i hope it helped...

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