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dan7478
27.10.2020 •
Mathematics
The proportion of eligible voters in the next election who will vote for the incumbent is assumed to be 53.6%. What is the probability that in a random sample of 470 voters, less than 48.1% say they will vote for the incumbent
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Ответ:
The required probability = 0.0084
Step-by-step explanation:
GIven that:
Sample proportion = 53.6% = 0.536
Sample size = 470
Then; the mean
= n × p
mean
= 470 × 0.536
mean
= 251.92
Standard deviation =![\sqrt{n\times p(1-p)}](/tpl/images/0844/0111/094a2.png)
Standard deviation =![\sqrt{470 \times 0.536(1-0.536)}](/tpl/images/0844/0111/4f298.png)
Standard deviation =![\sqrt{470 \times 0.536(0.464)}](/tpl/images/0844/0111/ab090.png)
Standard deviation =![\sqrt{116.89088}](/tpl/images/0844/0111/b3089.png)
Standard deviation = 10.81
The sample mean![\overline x = n \times \dfrac{48.1}{100}](/tpl/images/0844/0111/7e08b.png)
The sample mean![\overline x = 470 \times \dfrac{48.1}{100}](/tpl/images/0844/0111/fd81e.png)
The sample mean
= 226.07
Thus;
Therefore, the required probability = 0.0084
Ответ:
u is there supposed to be a picture
Step-by-step explanation: