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12345 [234]
2 years ago
15

The final exam grade distribution for all students in the introductory statistics class at a local community college is displaye

d in the table, with A = 4, B = 3, C = 2, D = 1, and F = 0. Let X represent the grade for a randomly selected student from the class. A 2-column table with 5 rows. Column 1 is labeled grade with entries 4, 3, 2, 1, 0. Column 2 is labeled probability with entries 0.4, 0.32, 0.17, 0.08, 0.03. What is the mean of the distribution? 2 3 2.98 3.50
Mathematics
1 answer:
Alex73 [517]2 years ago
5 0

The mean of the discrete distribution that models this situation is of 2.98.

<h3>What is the mean of a discrete distribution?</h3>

The expected value of a discrete distribution is given by the <u>sum of each outcome multiplied by it's respective probability</u>.

Considering the table, the probability distribution is given by:

  • P(X = 4) = 0.4.
  • P(X = 3) = 0.32.
  • P(X = 2) = 0.17.
  • P(X = 1) = 0.08.
  • P(X = 0) = 0.03.

Hence the mean is given by:

E(X) = 4 x 0.4 + 3 x 0.32 + 2 x 0.17 + 1 x 0.08 + 0 x 0.03 = 2.98.

More can be learned about the mean of a discrete distribution at brainly.com/question/27899440

#SPJ1

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A desk was purchased at a furniture retailer for $352.08. This price includes an 8% sales tax that is paid to the state. Not inc
Varvara68 [4.7K]

Answer:

  $326.00

Step-by-step explanation:

The marked price plus the tax gives the final price.

  final price = (marked price) + 0.08 × (marked price)

  final price = 1.08 × (marked price) . . . . . factor out marked price

  (final price)/1.08 = marked price . . . . . . . divide by the multiplying factor

  $352.08/1.08 = marked price = $326

The marked price of the desk was $326.

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How many sqaure units are in an office 13 units by 9 units
Nana76 [90]

Answer:

there are 117 square units.

Step-by-step explanation:

you multiply 13 by 9

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3 years ago
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Step-by-step explanation: the outcome would be bigger than 8.

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A new building that costs $1,000,000 has a useful life of 10 years and a scrap value of $200,000. Using straight-line depreciati
vazorg [7]

Answer:

V = -80,000*t + 1,000,000

Step-by-step explanation:

Given:

- The original cost V_i = $1,000,000

- Scrap Value V_f = $200,000

- Total number of years n = 10

Find:

Using straight-line depreciation, find the equation for the value V in terms of t, where t is in years.

Solution:

- The straight line depreciation method means their is a linear relationship between the value of building and time elapsed till useful life. The linear relationship takes a form:

                                 V = m*t + C

Where,

V: It is the current value of the building

m: The rate at which value increase or decrease with time t

C: The initial value of the building

- We will compute constants m and C as follows:

                               m = (V_f - V_i) / ( 10 - 0 )

                               m = (200,000 - 1,000,000) / 10

                               m = - $80,000/year

                               C = V_i = $1,000,000

- Plug the values of the constants evaluated above in the linear expression:

                                V = -80,000*t + 1,000,000

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