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
Plzzzzzz help meee!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
irina1246 [14]
Use the expression to find the answer. Substitute the information you have been given. 

1.5t + 20
= 1.5(5) + 20
= 7.5 +20
= 27.5 cm

5 days from today, the plant will have a height of 27.5
4 0
3 years ago
Sonji paid $25 for two scarves, which were different prices. When she got home she could not find the receipt. She remembered th
Lyrx [107]

Answer:

$13

Step-by-step explanation:

6 0
3 years ago
4. The cost of pizzas at two different shops is shown in the graph and table
ruslelena [56]

Answer:

I am not too sure but i think 6+5=11

Step-by-step explanation:

where 6 comes first then 11 comes second and that equals 11

7 0
3 years ago
How does the value of the 5 in 524.2 differ from the value of the 5 in 254.6??
mina [271]
In 524.2, 5 is in the hundreds place, so it stands for 500. In 254.6, 5 is in the tens place, so it stands for 50. You know what place it is in by how far to the left or right it is from the decimal point. 
4 0
3 years ago
Can someone write the standard form for this?
evablogger [386]

Answer:

try 10x + y = 9/7

Step-by-step explanation:


3 0
3 years ago
Other questions:
  • Sebastion swam laps every day in the community swimming pool. He swam 45 minutes each day, 5 days each week, for 12 weeks. In th
    8·1 answer
  • A 24-foot wire connects the top of an antenna to a point on the ground. If the antenna is 20 feet high, how far from the base of
    8·1 answer
  • A particular frozen yogurt has 75 calories in 2 ounces.How much calories are in 8 ounces of the yogurt?
    15·1 answer
  • An initial deposit of $50 is made into an account that had a 5% interest rate compounded annually. Which expression
    10·1 answer
  • The length of the rectangle is three times its width.The perimeter of the rectangle is at most 112 cm .
    11·1 answer
  • 6) How are a parallelogram and a trapezoid different?
    5·2 answers
  • Translate the word phrase into a math expression.
    8·1 answer
  • If the simple interest on $1,000 for 2 years is $140, then what is the interest rate?
    14·1 answer
  • Questions What is the first step to solve 3x+5=17? What is the second step to solve 3x+5=171 Solve 3x+5=1 ​
    10·2 answers
  • P (n), given below, is the price P in dollars for n grams of vitamins.P(n)=0.4n+5.7Complete the following statements.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!