2 years ago

More smart people pls

Mathematics

2 answers:

frez [133]2 years ago

6 0

3rd option im sorry if im incorrect

katrin2010 [14]2 years ago

3 0

Answer:

3) third option

4) second option

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In a certain city of several million people, 7.7% of the adults are unemployed. If a random sample of 300 adults in this city is

Lilit [14]

Answer: 0.2643

Step-by-step explanation:

Given : The proportion of adults are unemployed : p=0.077

The sample size = 300

By suing normal approximation to the binomial , we have

$\mu=np=300\times0.077=23.1$

$\sigma=\sqrt{np(1-p)}=\sqrt{300\times0.077(1-0.077)}\\\\=4.61749932323\approx4.62$

Now, using formula $z=\dfrac{x-\mu}{\sigma}$ , the z-value corresponding to 26 will be :-

$z=\dfrac{26-23.1}{4.62}\approx0.63$

Using standard distribution table for z , we have

P-value= $P(z\geq0.63)=1-P(z$

$=1-0.7356527=0.2643473\approx0.2643$

Hence, the probability that at least 26 in the sample are unemployed =0.2643

6 0

3 years ago

Help help help help help ASAP

Rufina [12.5K]

Answer:

No, it is much too low

5 0

3 years ago

Bianca has a total of $0.25 she has some nickels and pennies how many different combinations of nickels and pennies could Bianca

grandymaker [24]

4 nickels and 5 pennies.
5 nickels and 0 pennies

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3 years ago

Jason invests $1000 at a bank that offers 3% compounded annually. Write an equation to model the growth of the investment

MissTica

Y=1000*1.03^x is the correct compound recursive formula!

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3 years ago

Help quick I'm desperate

NeTakaya

Answer:

I am sorry but I do not know

Step-by-step explanation:

7 0

3 years ago

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