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maw [93]
3 years ago
15

Nikola buys a bouquet of 8 sunflowers for $18 What is the cost of 1 sunflower?

Mathematics
2 answers:
Umnica [9.8K]3 years ago
8 0
1 sunflower = $?
8 sunflowers = $18

Divide $18 by 8 = 2.25

1 sunflower is $2.25.
Vlad1618 [11]3 years ago
3 0
8 sunflowers = $18

18 \div 8 = 2.25

Answer: 1 sunflower costs $2.25.

Hope this helps. - M
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ki77a [65]

Answer:

n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38

So then the minimum sample to ensure the condition given is n= 38

Step-by-step explanation:

Notation

\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

\sigma=12 represent the population standard deviation

n represent the sample size  

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Solution to the problem

When we create a confidence interval for the mean the margin of error is given by this formula:

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

And on this case we have that ME =4 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (b)

The critical value for 96% of confidence interval now can be founded using the normal distribution. The significance is \alpha=1-0.96 =0.04. And in excel we can use this formula to find it:"=-NORM.INV(0.02;0;1)", and we got z_{\alpha/2}=2.054, replacing into formula (b) we got:

n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38

So then the minimum sample to ensure the condition given is n= 38

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Answer:

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