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3 years ago

7. Using the information from question #6, after how many

Mathematics

1 answer:

Montano1993 [528]3 years ago

8 0

Answer:

the answer would be F

Step-by-step explanation:

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You are to take a multiple-choice exam consisting of 64 questions with 5 possible responses to each question. Suppose that you h

stepan [7]

Answer:

(a) The expected score is 12.8

(b) The standard deviation is 3.2 and variance is 10.24

Step-by-step explanation:

Consider the provided information.

You are to take a multiple-choice exam consisting of 64 questions with 5 possible responses to each question.

Here n=64 p=1/5 and q=1-1/5=4/5

Part (a) we need to find the expected score on the exam.

Expected = np

Expected score = number of questions × P(right)

$Score = 64 \times \frac{1}{5} = 12.8$

Hence, the expected score is 12.8

Part (b) Compute the variance and standard deviation of x.

Standard Deviation: $\sigma =\sqrt{npq}$

Now calculate the standard deviation as shown:

$\sigma =\sqrt{64\times \frac{1}{5}\times \frac{4}{5}}$

$\sigma =\sqrt{\frac{256}{25}}$

$\sigma =\frac{16}{5}=3.2$

Variance: $\sigma^2 =npq$

$\sigma^2 =64\times \frac{1}{5}\times \frac{4}{5}$

$\sigma^2 =\frac{256}{25}$

$\sigma^2 =10.24$

Hence, the standard deviation is 3.2 and variance is 10.24

5 0

3 years ago

Can someone explain why the ans is X=6? Its (x-6)

andrew-mc [135]

Answer:

because either x-6=0 or x+1=0

x-6=0

x=0+6

x=6 OR,

x+1=0

x=0-1

x=-1

Step-by-step explanation:

5 0

3 years ago

If the company decides to produce 2000 containers of regular crunchy peanut butter, how many containers of new extra crunchy pea

Rina8888 [55]

Answer:

Step-by-step explanation:

5/9 = 2,500/4,500

to get that you times 5 by 500

and 9 by 500

4 0

3 years ago

I have no idea what to do I missed an entire lesson while I was in the hospital. Help please. I need to show my work as well.

Vlada [557]

Answer:

Step-by-step explanation:

$\sqrt[3]{\frac{n}{4} } +\frac{n}{10} \\\\\sqrt[3]{\frac{500}{4} } +\frac{500}{10}\\\\\sqrt[3]{125} +50\\5+50\\55$

3 0

3 years ago

If a city owes 1.2 million dollars in debt and the population of the city is 48,000, what is the debt per serson?

Rudiy27

$25 well i just divided 1.2 million by 48,000 and got 25.

I hope this helps!

5 0

3 years ago

Read 2 more answers