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N76 [4]
3 years ago
15

Help me with Question 4

Mathematics
2 answers:
ruslelena [56]3 years ago
7 0

Answer:

a

Step-by-step explanation:

Natali [406]3 years ago
6 0

Answer:

A

Step-by-step explanation:

This is cause the phrase two thirds refrences as two of three which is a fraction.

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A population of values has a normal distribution with μ=204.9μ=204.9 and σ=81.9σ=81.9. You intend to draw a random sample of siz
marin [14]

Answer:

7. μ=204.9 and σ=5.4968

8. μ=75.9 and σ=0.7136

9. p=0.9452

Step-by-step explanation:

7. - Given that the population mean =204.9 and the standard deviation is 81.90 and the sample size n=222.

-The sample mean,\mu_xis calculated as:

\mu_x=\mu=204.9, \mu_x=sample \ mean

-The standard deviation,\sigma_x is calculated as:

\sigma_x=\frac{\sigma}{\sqrt{n}}\\\\=\frac{81.9}{\sqrt{222}}\\\\=5.4968

8. For a random variable X.

-Given a X's population mean is 75.9, standard deviation is 9.6 and a sample size of 181

-#The sample mean,\mu_x is calculated as:

\mu_x=\mu\\\\=75.9

#The sample standard deviation is calculated as follows:

\sigma_x=\frac{\sigma}{\sqrt{n}}\\\\=\frac{9.6}{\sqrt{181}}\\\\=0.7136

9. Given the population mean, μ=135.7 and σ=88 and n=59

#We calculate the sample mean;

\mu_x=\mu=135.7

#Sample standard deviation:

\sigma_x=\frac{\sigma}{\sqrt{n}}\\\\=\frac{88}{\sqrt{59}}\\\\=11.4566

#The sample size, n=59 is at least 30, so we apply Central Limit Theorem:

P(\bar X>117.4)=P(Z>\frac{117.4-\mu_{\bar x}}{\sigma_x})\\\\=P(Z>\frac{117.4-135.7}{11.4566})\\\\=P(Z>-1.5973)\\\\=1-0.05480 \\\\=0.9452

Hence, the probability of a random sample's mean being greater than 117.4 is 0.9452

7 0
3 years ago
FIND THE DISTANCE BETWEEN THE TWO POINTS<br> A(0, 0), B(6, 8)
Alex

Answer:

10

Step-by-step explanation:

Mathematical Formula: \sqrt{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}

Therefore: \sqrt{\left(6-0\right)^2+\left(8-0\right)^2}

Which = 10

7 0
3 years ago
What is 5/12 Plus 5/12?
mestny [16]
\sf\dfrac{5}{12}+\dfrac{5}{12}

Since we already have like denominators, just add the numerators and keep the denominator.

\sf\dfrac{5+5}{12}\rightarrow\dfrac{10}{12}

Simplify:

\boxed{\sf\dfrac{5}{6}}
3 0
3 years ago
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A bengal tigers tail is around 30 percent of its total lenght the total lenghtbof one bengal tigers tail is 96 cm around how lon
ANEK [815]
The length of the tiger is 320 cm.
8 0
3 years ago
A little help on this ?
guapka [62]

do you have any good fruit and veggies for the next two

8 0
2 years ago
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