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Bess [88]
2 years ago
12

Use the Proportionality Theorem to solve for X.

Mathematics
1 answer:
aleksandr82 [10.1K]2 years ago
8 0

The proportion of 16 to 4 is 4 is 1/4 of 16( 4/16 = 1/4)

So x would be 1/4 of 12

12/4 = 3

X = 3

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Cereal originally Cost three dollars. The store has reduce the price by 25%. You have a coupon for additional 20% off the alread
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Answer:

around 1.50 or 1.25

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Jennifer and Jane are best friends. They placed a map of their town on a coordinate gridand found the point at which each of the
koban [17]

Given:

Jennifer and Jane are best friends. They placed a map of their town on a coordinate grid and found the point at which each of their house lies. If Jennifer's house lies at (2, 12) and Jane's house is at (16, 2) and they wanted to meet in the middle.

Required:

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10 months ago
Determine whether or not the given procedure results in a binomial distribution. If not, identify which condition is not met. Su
dlinn [17]

Answer:

No, the given procedure doesn't result in a binomial distribution.

Step-by-step explanation:

We can identify if a given procedure results in binomial distribution by observing whether these four conditions are met or not.

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Condition 2: The probability of success should stay same from trial to trial.

Condition 3: n is fixed (the number of observations)

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Surveying 2828 people to determine which statistics courses they have taken.

Condition 3 is satisfied since n is fixed

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3 years ago
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Answer Question Below
MAVERICK [17]
Ima guess with 1/3. i’m not sure
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The comprehensive strength of concrete is normally distributed with μ = 2500 psi and σ = 50 psi. Find the probability that a ran
VARVARA [1.3K]

Answer:

The probability that the diameter falls in the interval from 2499 psi to 2510 psi is 0.00798.

Step-by-step explanation:

Let's define the random variable, X = "Comprehensive strength of concrete". We have information that X is normally distributed with a mean of 2500 psi and a standard deviation of  50 psi (or a variance of 2500 psi). In other words, X \sim N(2500, 2500).

We want to know the probability of the mean of X or \bar{X} that falls in the interval [2499;2510]. From inference theory we know that :

\bar{X} \sim N(2500, \frac{2500}{5}) \Rightarrow \bar{X} \sim N(2500,500)

Now we can find the probability as follows:

P(2499 \leq \bar{X} \leq 2510) \Rightarrow P(\frac{2499 - 2500}{500} \leq \frac{\bar{X} - 2500}{500} \leq \frac{2499 - 2500}{500} ) \Rightarrow\\\Rightarrow P(-0.002 \leq \frac{\bar{X} - 2500}{500} \leq 0.02 ) \Rightarrow P(-0.002 \leq Z \leq 0.02 )

Where Z \sim N(0,1), then:

P(-0.002 \leq Z \leq 0.02 ) \approx P(0 \leq Z \leq 0.02 ) = P(Z \leq 0.02 ) - P(Z \leq 0) \\P(0 \leq Z \leq 0.02 ) = 0.50798 - 0.5 = 0.00798

8 0
3 years ago
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