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
Leona [35]
2 years ago
15

According to a survey, 18% of the car owners said that they get the maintenance service done on their cars according to the sche

dule recommended by the auto company. Suppose that this result is true for the current population of car owners. a. Let x be a binomial random variable that denotes the number of car owners in a random sample of 12 who get the maintenance service done on their cars according to the schedule recommended by the auto company. What are the possible values that x can assume
Mathematics
1 answer:
Annette [7]2 years ago
6 0

Answer:

a) For this case we define the random variable X="number of car owners in a random sample of 12 who get the maintenance service done on their cars according to the schedule recommended by the auto company". And for this case the distribution for X is:

X \sim Binom (n =12, p=0.18)

And the possible values for the random variable are X=0,1,2,3,4,5,6,7,8,9,10,11,12

b) Using the probability mass function we got:

P(X=3)=(12C3)(0.18)^3 (1-0.18)^{12-3}=0.21506

Step-by-step explanation:

Previous concepts

A Bernoulli trial is "a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted". And this experiment is a particular case of the binomial experiment.

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

The probability mass function for the Binomial distribution is given as:  

P(X)=(nCx)(p)^x (1-p)^{n-x}  

Where (nCx) means combinatory and it's given by this formula:  

nCx=\frac{n!}{(n-x)! x!}  

Solution to the problem

Part a

For this case we define the random variable X="number of car owners in a random sample of 12 who get the maintenance service done on their cars according to the schedule recommended by the auto company". And for this case the distribution for X is:

X \sim Binom (n =12, p=0.18)

And the possible values for the random variable are X=0,1,2,3,4,5,6,7,8,9,10,11,12

Part b

Find to 3 decimal places the probability that exactly 3 car owners in a random sample of 12 get the maintenance service done on their cars according to the schedule recommended by the auto company.

Using the probability mass function we got:

P(X=3)=(12C3)(0.18)^3 (1-0.18)^{12-3}=0.21506

You might be interested in
Which fraction is in lowest terms (simplest form) 12/18
Papessa [141]

Answer:

2:3

Step-by-step explanation:

Just divide each by 6

8 0
3 years ago
Read 2 more answers
An electric bulb is sold in a box measuring 5 cm by 4 cm by 4 cm. If the shopkeeper receives them in a carton measuring 50 cm by
katen-ka-za [31]

Answer:

250

Step-by-step explanation:

Bulb box and carton both are of cuboidal shape.

<u>For bulb </u><u>box</u><u> </u><u>the </u><u>d</u><u>imensions</u><u> </u><u>are:</u>

  • l = 5 cm, w = 4 cm, h = 4 cm

  • V_{Bulb\: box} =lwh

  • \implies V_{Bulb\: box} =5(4)(4)

  • \implies V_{Bulb\: box} =80\: cm^3

<u>For </u><u>Carton </u><u>the dimensions are</u><u>:</u>

  • l = 50 cm, w = 20 cm, h = 20 cm

  • V_{Carton} =lwh

  • \implies V_{Carton} =50(20)(20)

  • \implies V_{Bulb\: box} =20,000\: cm^3

To find the number of bulbs packed in the carton, divide the V_{Carton} by V_{Bulb\: box}

  • Number \:of \:bulbs =\frac{V_{Carton}}{V_{Bulb\: box}}

  • \implies Number \:of \:bulbs =\frac{20,000}{80}

  • \implies Number \:of \:bulbs = 250

So, 250 bulbs will be packed in one carton.

3 0
2 years ago
What is (x2 + 9x+ 18) / (x+6)
ohaa [14]

Answer:

x+3

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
What are the coordinates of point P on this graph?
GarryVolchara [31]

Answer:

The coordinates are 6,5.

Step-by-step explanation:

Go over 6 and go up 5 and 6ou have your answer.

3 0
2 years ago
Read 2 more answers
Which rule describes the composition of transformations that maps ΔJKL to ΔJ"K"L"?
Vera_Pavlovna [14]

The  rule that describes the composition of transformations that maps ΔJKL to ΔJ"K"L" is Rotation  0° to  90°  and reflection about the x-axis.

<h3>What is the transformations rule that was used here?</h3>

A transformation is a rule that is used to manipulate the position of a point of geometric figure.

Analyzing the figure, rotation of ΔJKL through the angle 90 degrees in a counter-clockwise direction gives us  ΔJ'K'L' .

ΔJ"K"L" is been gotten also using ΔJ'K'L'  through the refraction of ΔJ'K'L' across the x-axis.

In this case,   rule that describes the composition of transformations that maps ΔJKL to ΔJ"K"L" is Rotation  0° to  90°  and reflection about the x-axis.

Learn more about Transformation from

brainly.com/question/4218767

#SPJ1

6 0
1 year ago
Other questions:
  • This week an employee is scheduled to work 6 hours each day Monday through Friday, and 3.5 hours on Saturday morning. If the emp
    6·1 answer
  • Determine the 28th term of the sequence -242, -251, -260
    11·1 answer
  • A dinner plate has a diameter of about 9 inches what is the circumference and area?
    7·2 answers
  • C is the circumcenter of triangle PQR. PC=3x+7, RC=5x-15, and QC=51-x<br> What does QC=
    15·1 answer
  • Dinner came out of the oven at 7:15 P.M. after baking for 30 minutes. What time was dinner put into the oven?
    14·2 answers
  • Sara watched the pump at the gas station dispense gas at a rate of ½ gallon every 3 ¼ seconds. How long will it take, in seconds
    11·1 answer
  • Which is the value of this expression when j=-2
    9·1 answer
  • Help now !!! What is C. and F.
    7·2 answers
  • Please help! ASAP, no bots
    13·1 answer
  • What is the factored form of the polynomial?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!