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Y_Kistochka [10]
2 years ago
13

How many wholes are in 11/3?

Mathematics
1 answer:
lesantik [10]2 years ago
5 0
There are 3 holes because if you do 4 thats to high cuz you would get 12 hope this is what you mean
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A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she
Nataly_w [17]

Answer:

The minimum sample size needed is n = (\frac{1.96\sqrt{\sigma}}{4})^2. If n is a decimal number, it is rounded up to the next integer. \sigma is the standard deviation of the population.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1 - 0.9}{2} = 0.05

Now, we have to find z in the Z-table as such z has a p-value of 1 - \alpha.

That is z with a pvalue of 1 - 0.05 = 0.95, so Z = 1.645.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

How large a sample must she select if she desires to be 90% confident that her estimate is within 4 ounces of the true mean?

A sample of n is needed, and n is found when M = 4. So

M = z\frac{\sigma}{\sqrt{n}}

4 = 1.96\frac{\sigma}{\sqrt{n}}

4\sqrt{n} = 1.96\sqrt{\sigma}

\sqrt{n} = \frac{1.96\sqrt{\sigma}}{4}

(\sqrt{n})^2 = (\frac{1.96\sqrt{\sigma}}{4})^2

n = (\frac{1.96\sqrt{\sigma}}{4})^2

The minimum sample size needed is n = (\frac{1.96\sqrt{\sigma}}{4})^2. If n is a decimal number, it is rounded up to the next integer. \sigma is the standard deviation of the population.

4 0
3 years ago
47 In 2012 there were approximately 8,950 public libraries in the United States. A survey found
Ipatiy [6.2K]

Answer:

6802

Step-by-step explanation:

Number of liberaries = 8950

76% offered free acces to ebooks.

How many offered access to ebook = 76% / 100% x 8950

= 0.76 x 8950

= 6802

4 0
3 years ago
Which graph shows the correct solution to the inequality below?
Assoli18 [71]

Answer:

Third Option

Step-by-step explanation:

3x + 18 > 6x - 9

We have to find the value of x for this

Subtract 18 from both sides to leave 3x alone

3x > 6x - 27

Subtract 6x from both sides to be able to find the value of x

-3x > -27

Divide by -3 on both sides

x > 9

The answer would be the third option, since X is anything greater than 9

6 0
2 years ago
Read 2 more answers
Estimate f 3.85 given that f 4 )= 2 and f '( 4 )= 3
Vinvika [58]
The answer is B hope this helped
5 0
3 years ago
Anyone can help me with this please!!!????(don’t mind the question at the bottom!!)
weqwewe [10]

Answer:

a=6     b=12

Step-by-step explanation:

i think i could be wrong

6 0
3 years ago
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