3 years ago

Y=x+2 domain: 0,1,2,3

Mathematics

1 answer:

RUDIKE [14]3 years ago

4 0

0 = 2
1 = 3
2 = 4
3 = 5

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Step-by-step explanation:

Given that an advisor to the mayor of a large city wants to estimate, within 3 minutes, the mean travel time to work for all employees who work within the city limits.

Let X be the random variable denoting the time for employees to travel within city limit

Std dev of X $= 12.25 minutes$

For 95% confidence interval Z critical 1.96 is used because population std dev is known

Margin of error $= 1.96*std error = 3 (given)$

i.e. $1.96(\frac{12.25}{\sqrt{n} } )=3$

where n is the desired sample size.

Simplify to get

$\frac{24.01}{\sqrt{n} } =3\\n=64.053$

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