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steposvetlana [31]

3 years ago

5

Number 2 , answer ? I don’t know the answer and I need help

1 answer:

snow_tiger [21]3 years ago

8 0

Answer:

it's B

Step-by-step explanation:

because you just add those but before you do that you have to divide the fractions like for example 1/2=.5 so you add the .5 to 8 so 8.5 . And you keep doing that with the other ones that also have fractions and then once you're done doing that you add all your four numbers

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Suppose you have a sample of size 42 with a mean of 30 and a population standard deviation of 7.4. What is the maximal margin of

9966 [12]

Answer:

The maximal margin of error associated with a 95% confidence interval for the true population mean is 2.238.

Step-by-step explanation:

We have given,

The sample size n=42

The sample mean $\bar{x}=30$

The population standard deviation $\sigma=7.4$

Let $\alpha$ be the level of significance = 0.05

Using the z-distribution table,

The critical value at 5% level of significance and two tailed z-distribution is

$\pm z_{\frac{0.05}{2}}=\pm 1.96$

The value of margin of error is

$ME=z_{\alpha/2}(\frac{\sigma}{\sqrt{n}})$

$ME=1.96(\frac{7.4}{\sqrt{42}})$

$ME=1.96(1.1418)$

$ME=2.238$

The maximal margin of error associated with a 95% confidence interval for the true population mean is 2.238.

4 0

3 years ago

A 4 wheeler that travels 52 miles on 5 gallons of gasoline. A second 4 wheeler travels 21 miles on 2 gallons of gasoline which c

nalin [4]

Answer:

The second 4 wheeler gets better mileage

Step-by-step explanation:

First 4 wheeler:

52mi - 5gal

Second 4 wheeler:

21mi - 2 gal

To compare we have to make sure everything is equal so,

5÷2 = 2.5

so,

second 4 wheeler:

21*2.5=52.5 , 2*2.5=5

52.5mi - 5gal

52<52.5

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2 years ago

Translate the description as an algebraic expression:<br> 5 more than the sum of 11 and b

e-lub [12.9K]

x= (11+b)+5

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2 years ago

Which equation can be used to find n the distance between 3/8

GuDViN [60]

Answer:

3/8 - N = 61/64.

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3 years ago

What is the value for y? Explain please

Reil [10]

I hope this helps you

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3 years ago