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
Korvikt [17]
3 years ago
12

Last​ year, a person wrote 123 checks. Let the random variable x represent the number of checks he wrote in one​ day, and assume

that it has a Poisson distribution. What is the mean number of checks written per​ day? What is the standard​ deviation? What is the​ variance?
Mathematics
1 answer:
Sunny_sXe [5.5K]3 years ago
3 0

Answer:The mean number of checks written per​ day = 0.3370

The standard deviation = 0.5805

The variance = 0.3370

Step-by-step explanation:

Let the random variable x represent the number of checks he wrote in one​ day.

Given : The number of checks written in last year = 123

Let the number of days in the year must be 365.

Now, the mean number of checks written per​ day will be  :-

\lambda=\dfrac{123}{365}=0.33698630137\approx0.3370

We know that in Poisson distribution , the variance is equals to the mean value .

\text{Thus , Variance }=\sigma^2= 0.3370

\Rightarrow\ \sigma=\sqrt{0.3370}=0.580517010948\approx0.5805

Thus,  Standard deviation = 0.5805

You might be interested in
A rectangle has a perimeter of 54 cm. It has a length of 15 cm. What is its area? *
d1i1m1o1n [39]

the area is 180 cm. to find the perimeter you would do 15+15+14+14 to get 54 cm. So for area you do (l×w) which is 15×14=180.

5 0
3 years ago
Multiply: (x+4)(x^2+2x+3) <br> Simplify and write your answer in Standard Form.
Oxana [17]

Answer:

x^3+6x^2+11x+12

Step-by-step explanation:

(x+4)(x^2+2x+3)

=x(x^2+2x+3)+4(x^2+2x+3) [by multiplying with bith sides]

=x^3+2x^2+3x+4x^2+8x+12

=x^3+2x^2+4x^2+3x+8x+12

=x^3+6x^2+11x+12

(please mark me brainliest)

6 0
2 years ago
Alice rolls a fair dice and flips a fair coin
NemiM [27]

1,2,3,4,6 are factors of 12

5/6 is the probability of getting a factor of 12

1/2 is the probability of getting a tail

5/6*1/2 = 5 /12

Answer: 5/12

3 0
3 years ago
Read 2 more answers
How should this problem be solved?<br> (a^3)^2
fiasKO [112]
  (a^3)^2
= a^(3*2)
= a^6
or
   a^3 * a^3
= a^(3+3)
= a^6

7 0
3 years ago
8 more than 4 times a number is 36
algol13

Answer:

8+4×z=36

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • PLZZZ HELP I WILL GIVE BRAINLEST ON A TIMER
    15·2 answers
  • A typist charges $0.98 a page and averages 30 pages per workday. If he works 5 days a week, how much does he earn in a week? $5.
    10·2 answers
  • One bag contains 3/5 kg of corn. A farmer feeds his chickens 4 bags of corn each week. How many kilograms of corn do they eat ea
    12·1 answer
  • Mario and Luigi were selling coupon books for the Video game club fundraiser. Apparently, Mario is a much better salesperson, be
    6·1 answer
  • 4/9. 11/13. 6/5. 14/21 in simplest form
    6·2 answers
  • Decimal greater than 1 write the word form and expanded form for each 3.4
    7·1 answer
  • Solve for R. 3 + 3r &gt; 9
    7·1 answer
  • Help please thank you
    11·2 answers
  • Please! Due soon
    8·1 answer
  • Brian purchased a rectangular-shaped granite countertop for the island in his kitchen. The granite slab measures
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!