3 years ago

Question 13

Mathematics

1 answer:

horsena [70]3 years ago

4 0

Answer:

4x² - x

Step-by-step explanation:

Add:

3x² + 2x - 1

x² - 3x + 1

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Answer:

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Step-by-step explanation:

Given

$p = 21\%$

$n = 498$

Required

$P(-3\% < x < 3\%)$

First, we calculate the z score

$z = \sqrt{p * (1 - p)/n}$

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