1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
WINSTONCH [101]
2 years ago
6

According to a survey, 60% of adults believe that all college stu- dents should be required to perform a specified number of hou

rs of community service to graduate. Assume that this percentage is true for the current population of adults.
a. Find the probability that the number of adults in a random sample of 12 who hold this view is
i. exactly 8 (use the appropriate formula)
ii. at least 6 (use the appropriate table from Appendix B)
iii. less than 4 (use the appropriate table from Appendix B)
b. Let x be the number of adults in a random sample of 12 who believe that all college students should be required to perform a specified number of hours of community service to gradu- ate. Using the appropriate table from Appendix B, write the probability distribution of x. Find the mean and standard deviation of x.
Mathematics
1 answer:
GalinKa [24]2 years ago
3 0

The table isnt attached, However, using formula we can obtain the result.

Answer:

0.2128 ; 0.8418 ; 0.015316

Step-by-step explanation:

Using binomial probability formula :

P(x = x) = nCr * p^x * (1 - p)^(n-x)

p = 60% = 0.6

n = sample size = 12

Probability of :

i. exactly 8

P(x = 8) = 12C8 * 0.6^8 * 0.4^4

495 * 0.01679616 * 0.0256 = 0.2128

ii. at least 6

P(x ≥ 6) = p(6) + p(7) +... + p(12)

Using calculator to save computation time :

P(x ≥ 6) = 0.8418 (binomial probability calculator)

iii. less than 4

P( x < 4) = p(3) + p(2) + p(1) + p(0)

P( x < 4) = 0.0125 + 0.0025 + 0.0003 + 0.000016

= 0.015316

You might be interested in
Washer B can wash 144 loads in 3 days. At this rate, how many loads can Washer B wash in 10 days?
sineoko [7]
The answer is 480 because 144/3 is 48. You multiply 48 and 10 to get 480
7 0
3 years ago
The circumference of a circular field is 285.74 yards. What is the diameter of the field? Use 3.14 for it and do not round your
trapecia [35]

Answer:

The diameter is 91.

Step-by-step explanation:

The formula for circumference is 2*pi*radius(you can use circumference = diameter*pi too). Plug 285.74 into it. Divide both sides by 3.14, and you get 2*radius(aka the diameter) = 91

8 0
3 years ago
Read 2 more answers
Plz help similarity theorems
Pachacha [2.7K]

Answer:

<h2>Hey , option B is correct ....</h2>

as two angles are equal

6 0
2 years ago
Read 2 more answers
If you are smart put this emojiif u not smart put this emoji ok thanks
PtichkaEL [24]
Yesssss that is right
3 0
3 years ago
Read 2 more answers
HELP ME PLEASE!! im being timed :(
jeka57 [31]

Answer:

the first one and the third one

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which is more 4/6 or 2/8
    8·1 answer
  • I need helpppppppppppppppppppppppppppppp
    9·1 answer
  • 3(2x+6)<br> Distributive Property<br> Explain how u got it.<br><br> Will mark Brainliest.
    14·2 answers
  • pls help me i need your help thank you soo much pls don't waste someone's change of answer I need this to pass this class
    7·1 answer
  • A soup can is in the shape of a cylinder with a radius of 1 inch and the height of 3 inches. How much paper is used for the labe
    9·1 answer
  • Add. (6x^2-2x)+(5x-7)
    9·2 answers
  • Two trains on opposite tracks leave the same station at the same time. one train travels at an average speed of 80 km/hr and the
    8·1 answer
  • Is there a value of x that makes each of the following equalities true? If there is, find it.
    12·1 answer
  • Nicole went shopping for a new phone. Sales tax where she lives is 7%. The price of the phone is $21. Find the total price inclu
    15·1 answer
  • A 2-liter bottle of juice costs $2.80. A box containing six 1/2 liter bottles sells for $3.90. Which option has a higher cost pe
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!