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laila [671]
3 years ago
11

The table shows the proportion of US e-commerce revenue for 2016–2018 for each day of Thanksgiving weekend.

Mathematics
1 answer:
scoray [572]3 years ago
7 0

Answer:

The greatest proportion of 2018 e-commerce revenue came on Cyber Monday, contributing one-third of the total 2018 e-commerce revenue. This statement is  <u>✔ correct.</u>

<u />

Of 2016’s e-commerce revenue, $25 billion came on Black Friday. This statement is  <u>✔ incorrect— “25 percent” should replace “$25 billion.”</u>

EDGE2021

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0.07 \geq 1.727 \times \sqrt{\frac{0.5(1-0.5)}{n}}

\frac{0.07}{1.727}\geq sqrt{\frac{0.5(1-0.5)}{n}}

(\frac{0.07}{1.727})^2 \geq \frac{0.5(1-0.5)}{n}

n \geq \frac{0.5(1-0.5)}{(\frac{0.07}{1.727})^2}

n \geq 152.169

So, Option B is true

Hence  we have to flip 153 times the coin in order to obtain a 95.8% confidence interval of width of at most .14 for the probability of flipping a head

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