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2 years ago

A scientist calculated the mean and standard deviation of a data set to be = 120 and 0-9. She then found that she was

Mathematics

1 answer:

Lapatulllka [165]2 years ago

5 0

Answer:

The awnser on edge is C)147

Step-by-step explanation:

Hope this helped

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A student answers a multiple-choice examination question that offers four possible answers. Suppose the probability that the stu

Salsk061 [2.6K]

Answer:

The value is $P(A | W) = 0.941$

Step-by-step explanation:

From the question we are told that

The probability that the student knows the answer to the question is $P(A) = 0.8$

The probability that that the student will guess is $P(G) = 0.2$

The probability that that the student get the correct answer given that the student guessed is $P(W /G) = 0.25$

Here W denotes that the student gets the correct answer

Generally it a certain fact that if the student knows the answer he would get it correctly

So the probability the the student got answer given that he knows it is

$P(W | A) = 1$

Generally from Bayes theorem we can mathematically evaluate the probability that the student knows the answer given that he got it correctly as follows

$P(A | W) = \frac{ P(A) * P(W | A )}{ P(A) * P(W | A) + P(G) * P(W| G)}$

=> $P(A | W) = \frac{ 0.8 * 1}{ 0.8 * 1+ 0.2 * 0.25}$

=> $P(A | W) = 0.941$

4 0

3 years ago

Is anyone good at algebra 2? if so do u have insta or snapcl?

Bess [88]

Answer:

I'm good at Algebra 2 I've taken it already

Step-by-step explanation:

7 0

3 years ago

What is the measure in radians for the central angle of a circle whose radius is 5 and intercepted arc length is 7.2? Round your

Olegator [25]

Answer:

$0.46\pi\ radians$

Step-by-step explanation:

step 1

Find the circumference

The circumference of a circle is equal to

$C=2\pi r$

we have

$r=5\ units$

assume

$\pi=3.14$

substitute

$C=2(3.14)(5)=31.4\ units$

step 2

Find the measure in radians for the central angle of a circle whose radius is 5 and intercepted arc length is 7.2 units

Remember that

The circumference of $31.4\ units$ subtends a central angle of $2\pi \ radians$

using proportion

Let

x-----> the central angle in radians

$\frac{2\pi}{31.4}=\frac{x}{7.2} \\ \\x=2\pi (7.2)/31.4\\ \\x=0.46\pi\ radians$

7 0

3 years ago

I need help in algebra

Fudgin [204]

Answer:

Step-by-step explanation:

5 0

2 years ago

Shaniya is training for a 10 mile race. She wants to finish the race in tess than 98 minutes. Her first

Ostrovityanka [42]

Answer:

80 minutes per 10 miles

Step-by-step explanation:

Because 1 mile is 8 so you first multiply 8 times 10 to get the answer

4 0

3 years ago