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
damaskus [11]
3 years ago
13

Analysis showed that the mean arrival rate for vehicles at a certain Shell station on Friday afternoon last year was 4.5 vehicle

s per minute. How large a sample would be needed to estimate this year's mean arrival rate with 98 percent confidence and an error of ± 0.5?
Mathematics
2 answers:
Solnce55 [7]3 years ago
7 0

Answer:

25

Step-by-step explanation:

use a Poisson process to model the arrival.

the mean rate of arrivals  is λ=4.5

The standard deviation is calculated as:

σ==√λ =2.1213

The z-value for a 98% CI is z=2.3262.

If the 98% CI has to be within a error of 0.5 then:

Ul-Ll=2z*σ/√n=2*0.5=1

√n=z*σ=2.3262*2.1213=4.9346

√n=4.9346  and n = 4.9346^2=24.35 rounded to 25

The sample size needed is n=25.

nadezda [96]3 years ago
3 0

Answer:

idk sorry

Step-by-step explanation:

You might be interested in
caroline won $250,000 in a lottry. after paying $96,000 in taxes, she placed the remaining amount in a savings account at 2% int
BigorU [14]

Answer:

18,480

Step-by-step explanation:

you would fine how much she put in the bank in the first place!

250,000-96,000=154,000

Then you would do 154,000*0.02 to find how much interest is charged per month.

154,000*0.02=3080

Finally, you would multiply 3080 by 6 {because you need to account for all of the months}.

3080*6=18,480

5 0
3 years ago
Help, adding extra text so that I can post this question
GREYUIT [131]
The answer 0.1, 0.136, 0.652, 0.87
8 0
3 years ago
Read 2 more answers
Help!!!! Volume of a cylinder!!!!
belka [17]

Answer:

62.8318530718

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
A circle has a diameter of 41 centimeters. Which equation can be used to find the radius of this circle? r=41π r=2(41) r=412 r=4
irinina [24]

Answer:

r=41/2

Step-by-step explanation:

You have to divide the diameter,  41, by 2 because the radius of the circle is half of the diameter. So, the answer would be 20.5

8 0
2 years ago
Read 2 more answers
Please find the answer to this function! F(2)= 6x^4-10x^3+40x-50
steposvetlana [31]

<u>Answer-</u>

f(2)= 6x^4-10x^3+40x-50=46

<u>Solution-</u>

The given function is,

\Rightarrow f(x)= 6x^4-10x^3+40x-50

Now, we have to find the value of f(x) at x=2 i.e f(2), so putting x as 2 in the given function,

\Rightarrow f(2)= 6(2)^4-10(2)^3+40(2)-50

\Rightarrow f(2)= (6\times 16)-(10\times 8)+(40\times 2)-50

\Rightarrow f(2)= (6\times 16)-(10\times 8)+(40\times 2)-50

\Rightarrow f(2)= 96-80+80-50

\Rightarrow f(2)= 96-50

\Rightarrow f(2)= 46

Therefore, f(2) was found to be 46.


7 0
3 years ago
Other questions:
  • How do I find x? I am not sure how to get it because of the lines
    14·1 answer
  • the first term of a sequence of numbers is 16 the term to term rule of this sequence is 'add 8' which number will be the first i
    6·1 answer
  • Help Pleasee i need help really bad
    13·2 answers
  • HELLLPPPPPPP
    13·1 answer
  • 1 Mrs. Castro has 100 spoon and 80 forks if she put them in buckets what is the biggest number of spoon or forks that bucket wil
    11·1 answer
  • 7.8x = 32.76<br><br><br> Show your work
    5·1 answer
  • What is the surface area of this square pyramid? Please help
    7·1 answer
  • Area of triangle with sides a=8, b= 10, c=7
    9·2 answers
  • Which interval notation represents the inequality 0 &lt; x ≤ 5?
    9·1 answer
  • May 06,
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!