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3 years ago

HELP ME NOW ASAPPP UnU

Mathematics

2 answers:

hichkok12 [17]3 years ago

6 0

Answer:

56.757 and if u divide it : 676.75

Step-by-step explanation:

uwu

krok68 [10]3 years ago

4 0

56.757 IF U DIVIDE BY IT U GET 676.75

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A population of values has a normal distribution with μ = 247 and σ = 62.2. You intend to draw a random sample of size n = 16. (

nadya68 [22]

Answer:

a) $z = \frac{295.2-247}{62.2}=0.772$

And using the normal distribution table or excel we got:

$P(Z>0.772) = 1-P(Z$

b) $z = \frac{295.5 -247}{\frac{62.2}{\sqrt{16}}}= 3.119$

And we can use the normal standard table or excel in order to find the probability and we got:

$P(z>3.119) =1-P(Z$

Step-by-step explanation:

For this case we know that the random variable of interest is normally distributed with the following parameters:

$X \sim N (\mu = 247, \sigma =62.2)$

Part a

We want to find this probability:

$P(X>295.2)$

And we can use the z score formula given by:

$z = \frac{X-\mu}{\sigma}$

Replacing we got:

$z = \frac{295.2-247}{62.2}=0.772$

And using the normal distribution table or excel we got:

$P(Z>0.772) = 1-P(Z$

Part b

We select a random sample of size n = 16 and we try to find this probability:

$P(\bar X >295.2)$

And we can use the z score formula given by:

$z = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

And replacing we got:

$z = \frac{295.5 -247}{\frac{62.2}{\sqrt{16}}}= 3.119$

And we can use the normal standard table or excel in order to find the probability and we got:

$P(z>3.119) =1-P(Z$

8 0

3 years ago

On a school basketball team, 13 out of 16 students are in grade 8, write a proportion

arsen [322]

Answer:

The proportion is 13 : 3 .

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

at the start of a carnival, you have 50 ride tickets. Each time you ride the roller coaster, you have to pay 6 tickets. Linear o

aleksandr82 [10.1K]

Answer:

I think Linear, not for sure though.

Step-by-step explanation:

I hope this helps :)

6 0

3 years ago

Dan earns $9.50 per hour as a dishwasher. Determine the fewest number of hours he must work to earn

Oksana_A [137]

Answer:

43 hours

Step-by-step explanation:

$\frac{y}{1} :\frac{408}{9.5}$

y × 9.5 = 408 × 1

9.5y = 408

9.5y ÷ 9.5 = 408 ÷ 9.5

$y=42\frac{18}{19}$

43 hours

8 0

3 years ago

Read 2 more answers

tina bought some clothes from a high end store that cost 6,719. her friend Betty bought the same quantity of clothes from a low

Agata [3.3K]

Answer:

5437

Step-by-step explanation:

Subtract the original amount 6,719 and 1282

you get 5,437

Hope this helps!

Have a nice day! :D

Mark brainliest if possible pls :)

4 0

3 years ago