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2 years ago

2) (-10) + (-7) shoe work

Mathematics

1 answer:

Sladkaya [172]2 years ago

7 0

A negative plus a negative equals a negative so it's just -17

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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

What is -8 = 7 - 3/2 x

Alika [10]

X=10. Hope this helps!

7 0

2 years ago

Read 2 more answers

As an estimation we are told £3 is €4.

Andru [333]

<h2>Greetings!</h2>

Answer:

€16.40

Step-by-step explanation:

First, we need to divide £12.30 by 3 to find out how many groups of 3 there is:

12.3 ÷ 3 = 4.1

Now we can multiply this by 4 to find the euro equivalent:

4.1 * 4 = 16.4

So £12.30 is €16.40

<h2>Hope this helps!</h2>

6 0

3 years ago

Which number is least 145. 155 or 144.809

GREYUIT [131]

145.555 is the least

7 0

2 years ago

Read 2 more answers

Guess the number pleaseeee

MaRussiya [10]

I might be wrong but 9

9*2=18
18+7= 25
25 square root = 5

Answer is 9

7 0

2 years ago