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
kvasek [131]
3 years ago
15

Of all customers purchasing automatic garage door openers, 75% purchase chain-driven model. Let X = the number among the next 15

purchasers who select the chain-driven model. a. What is the frequency function (pmf) of X?
Business
1 answer:
KIM [24]3 years ago
6 0

Answer:

         P(X=x)=C(15,x)\cdot(0.75)^x\cdot(0.25)^{(15-x)}

Explanation:

The <em>probability mass function</em> (<em>PMF</em>), or <em>frequency function</em>, is the function that gives the probabilities that a <em>discrete random variable</em> take some values.

In this problem, it is requested the frequency function (PMF) for the <em>number of purchasers, among the next 15, who select a chain-driven model</em>.

Then , you need to find, the function that gives P(X=0), P(X=1), P(X=2), P(X=3), . . . up to P(X=15).

Such as any function, the frequency  function can be presented as a formula, as a table, or as a graph.

Note that the statement represents a binomial disbribution in which success is that a customer select a chain-driven model and the fail is that a cusotmer does not select a chain-driven model.

The binomial probability for X = the number among the 15 purchasers who select the chain-driven model is given by the formula:

           P(X=x)=C(n,x)\cdot(p)^x\cdot(1-p)^{(n-x)}

Where:

  •  C(n,x)=\dfrac{n!}{x!(n-x)!}
  •   n is the number of times the experiment is performed: 15 in our problem
  • p is the probability of succes: 0.75 in our problem
  • 1-p is the probability of fail: 0.25 in our problem

Then, substitute:

           P(X=x)=C(15,x)\cdot(0.75)^x\cdot(0.25)^{(15-x)}

That is the frequency function.

If you want to give it as a table you must find P(X=1), P(X=2), P(X=3), . . . up to P(X=15) using that function. That is not part of the question.

You might be interested in
A dot plot titled Miles Emilia Ran Each Week going from 1 to 6. 1 has 2 dots, 2 has 3 dots, 3 has 2 dots, 4 has 2 dots, 5 has 3
ipn [44]

Answer:

The true statement is " The spread is from 1 to 6."

Explanation:

Consider the provide information.

First we will draw the dot plot as shown in the figure.

Now consider the options.

The data is not symmetric as for the symmetry the dots over 1 should be equal to the dots over 6. i.e 4.

Now find the center of the data by calculation the median of the data.

There are 16 dots in total which is an even number.

So, now we will find the average of the two middle values.

This will be the 8th and 9th value average for the given data set of 16 values.

Count from left to right the 8th and 9th values are both 4.

\text{Median}=\frac{4+4}{2}

\text{Median}=4

Hence, the center of the data is 4.

The second statement is false.

The peak of the data is at 6.

The third statement is false.

The spread is from 1 to 6 as we can see in the figure shown below.

Therefore, the true statement is " The spread is from 1 to 6."

8 0
3 years ago
Read 2 more answers
what tax software program do you feel would be your best choice today and why do you think it is the best? ​
Fynjy0 [20]

Answer:

Turbotax

Explanation:

it's easy to use especially for first timers.

6 0
3 years ago
What is included in a speaking outline that is not included in a working outline?
aivan3 [116]
Idk never heard of this before
3 0
3 years ago
Central Supply purchased a new printer for $67,500. The printer is expected to operate for nine (9) years, after which it will b
Sergeu [11.5K]

Answer:

The correct answer is D.

Explanation:

Giving the following information:

Central Supply purchased a new printer for $67,500. The printer is expected to operate for nine (9) years, after which it will be sold for salvage value (estimated to be $6,750).

Annual depreciation= 2*[(original cost - residual value)/estimated life (years)]

Year 1= 2*[(67,500 - 6,750)/9]= $13,500

8 0
3 years ago
You just sold 300 shares of stock at a price of $42.06 a share. You purchased the stock for $39.80 a share and have received tot
Alex Ar [27]

Answer:

$678

Explanation:

Given that,

Number of shares sold = 300

Selling price of each share = $42.06

Cost of purchasing shares = $39.80 per share

Total dividend received = $1,272

We can easily determine the total capital gain on this investment by comparing the sales value and purchase value of this stock.

Total capital gain on this investment:

= Sales value - Purchase value

= (Number of units × Selling price per unit) - (Number of units × cost of purchasing per share)

= (300 × $42.06) - (300 × $39.80)

= $12,618 - $11,940

= $678

3 0
3 years ago
Other questions:
  • Bryant Company has a factory machine with a book value of $90,000 and a remaining useful life of 5 years. It can be sold for $30
    15·2 answers
  • When selecting the best alternative in a cost-benefit analysis, what are the issues to be considered?
    5·1 answer
  • An insurance company is
    15·1 answer
  • Suppose that the United States decided to subsidize a major competitive effort by the semiconductor industry to bring to market
    9·1 answer
  • If u cause a car accident which type of insurance will require you to pay the least out of pocket?
    8·1 answer
  • Corcoran Corp. pays a constant $7.10 dividend on its stock. The company will maintain this dividend for the next 10 years and wi
    9·1 answer
  • When the interest rate on a bond is above the equilibrium interest rate, there is excess __________ in the bond market and the i
    8·1 answer
  • If the market demand for the product increases, in the short run a purely competitive firm:
    15·1 answer
  • Which is and example of a short-term investment
    12·1 answer
  • E6-9 Reporting Purchases, Purchase Discounts, and Purchase Returns Using a Perpetual Inventory System [LO 6-3] During the month
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!