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Igoryamba
3 years ago
11

A population of rabbits is doubling every 20 days. On day 15, there are 42 rabbits. How many rabbits did the population start wi

th? Round to the nearest whole number.
Mathematics
1 answer:
Nimfa-mama [501]3 years ago
5 0

Answer:     So, if it just magically doubles every 20 days, and its only been 15 days, then it would've started with 42, but I'm not sure since I can't see the original problem

Step-by-step explanation:

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A research firm conducts a sample survey and discovers that 90% of people are more afraid of snakes than they are of flying. If
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Answer:

Different values of margin of error for different significance level.

Step-by-step explanation:

We are given the following in the question:

p =  90% = 0.9

Sample size, n  790

We have to find the margin of error.

Formula:

z_{stat}\sqrt{\dfrac{p(1-p)}{n}}

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

Putting values, we get,

ME = \pm 1.96\sqrt{\dfrac{0.9(1-0.9)}{790}}\\\\ME = \pm 0.021

z_{critical}\text{ at}~\alpha_{0.10} = 1.64

ME = \pm 1.64\sqrt{\dfrac{0.9(1-0.9)}{790}}\\\\ME =\pm 0.018

z_{critical}\text{ at}~\alpha_{0.10} = 2.58

ME =\pm 2.58\sqrt{\dfrac{0.9(1-0.9)}{790}}\\\\ME =\pm 0.028

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