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hodyreva [135]
3 years ago
10

Help me plz ASAP!! Will mark Brainliest if you figure it out! 10 points!

Mathematics
2 answers:
Sidana [21]3 years ago
6 0

Answer:

60 persent

Step-by-step explanation:

because i also do study island

and i already did that leasonn

sweet-ann [11.9K]3 years ago
5 0

Answer:

60%

Step-by-step explanation:

18,000 / 8% = 1440

1,440 + 2,400 = 3,840

1,440 / 2,400 = 0.60

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Suppose a simple random sample of size 50 is selected from a population with σ=10σ=10. Find the value of the standard error of t
bogdanovich [222]

Answer:

a) \sigma_{\bar x} = 1.414

b) \sigma_{\bar x} = 1.414

c) \sigma_{\bar x} = 1.414

d) \sigma _{\bar x} = 1.343

Step-by-step explanation:

Given that:

The random sample is of size 50 i.e the population standard deviation  =10

Size of the sample n = 50

a) The population size is infinite;

The standard error is determined as:

\sigma_{\bar x} = \dfrac{\sigma}{\sqrt{n}}

\sigma_{\bar x} = \dfrac{10}{\sqrt{50}}

\sigma_{\bar x} = 1.414

b) When the population size N= 50000

n/N = 50/50000 = 0.001 < 0.05

Thus ; the finite population of the standard error is not applicable in this scenario;

Therefore;

The standard error is determined as:

\sigma_{\bar x} = \dfrac{\sigma}{\sqrt{n}}

\sigma_{\bar x} = \dfrac{10}{\sqrt{50}}

\sigma_{\bar x} = 1.414

c)  When the population size N= 5000

n/N = 50/5000 = 0.01 < 0.05

Thus ; the finite population of the standard error is not applicable in this scenario;

Therefore;

The standard error is determined as:

\sigma_{\bar x} = \dfrac{\sigma}{\sqrt{n}}

\sigma_{\bar x} = \dfrac{10}{\sqrt{50}}

\sigma_{\bar x} = 1.414

d) When the population size N= 500

n/N = 50/500 = 0.1 > 0.05

So; the finite population of the standard error is applicable in this scenario;

Therefore;

The standard error is determined as:

\sigma _{\bar x} = \sqrt{\dfrac{N-n}{N-1} }\dfrac{\sigma}{\sqrt{n} } }

\sigma _{\bar x} = \sqrt{\dfrac{500-50}{500-1} }\dfrac{10}{\sqrt{50} } }

\sigma _{\bar x} = 1.343

7 0
3 years ago
What is next step in solving this equation <br> 32x+2=40
Alenkinab [10]

Answer:

32x+2=40

-2 -2

32x=42

.................

5 0
3 years ago
Glen Davis is shooting free throws. Making or missing free throws doesn't change the probability that he will make his next one,
Serjik [45]

Answer:

0.00457 or 0.457%

Step-by-step explanation:

Glen Davis makes a free throw 74% of the time, meaning he misses 26% of the time. Four him to miss four in a row, it would require him to miss his first throw and his second throw and his third throw and his fourth throw. I highlight and because it is a helpful tip to remember that AND situations require multiplication while OR situations require addition.

So in this question we multiply the probabilities of him missing.

P(MMMM) = \frac{26}{100}* \frac{26}{100} *\frac{26}{100}* \frac{26}{100}  = 0.00457

This answer has been rounded off to three significant figures

4 0
3 years ago
Read 2 more answers
What do 15/140 equal
Virty [35]
The answer would be 0.10714 or 3/28 if you wanted to simplify it.
7 0
3 years ago
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−0.75 − (-2/5) + 0.4 + (-3/4)
Hoochie [10]

Answer: -0.7

Step-by-step explanation:

8 0
3 years ago
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