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
-BARSIC- [3]
2 years ago
8

A length of chain is to be constructed by placing 36 component links end to end. The length of a link produced by a production p

rocess is known to be a random variable with a mean of 2.5 cm with a standard deviation 0.2 cm. The 36 links are chosen at random from this process to produce the chain. The mean and standard deviation of the length of chain are, respectively _________.
a. 90 cm, 7.2 cm
b. 36 cm, 1.2 cm
c. 90 cm, 2.7 cm
d. 90 cm, 1.2 cm
e. 36 cm, 7.2 cm
Mathematics
1 answer:
Setler79 [48]2 years ago
5 0

Answer:

d. 90 cm, 1.2 cm

Step-by-step explanation:

Given that:

The sample size n = 36

For the  length of the link:

The mean \overline x = 2.5

The standard deviation s = 0.2 cm

In a chosen 36 links, The mean and standard deviation for the length chain is as follows:

Mean = n\overline x

Mean = 36×2.5

Mean = 90 cm

The Standard deviation = s×√n

The Standard deviation = 0.2×√36

The Standard deviation = 0.2×6

The Standard deviation = 1.2 cm

You might be interested in
Q8 Q18.) How many adults and students should attend to raise the maximum amount of​ money?
Kruka [31]
160 adults and 80 students seems to be correct
5 0
3 years ago
Read 2 more answers
Help please...I'll do anything...
Sveta_85 [38]

Answer:

Step-by-step explanation:

Here is a formula that can help:

4 0
2 years ago
What is the solution to the system of equations?
melamori03 [73]

Answer:

it is b

Step-by-step explanation:

dam gurll, how many questions u gon' ask

3 0
3 years ago
Is (2, 3) a solution to this system of equations?<br> y :<br> = x + 2<br> -1<br> y = -x + 4<br> 2
MakcuM [25]

Step-by-step explanation:

so blue and pink = purple      Yellow and red = orange    

8 0
2 years ago
Roy's average balance checking account pays simple interest of 4.8% annually, and he made $2.25 in interest last month. What was
Klio2033 [76]

The first thing you do is you divide the annual interest into 12 months

4.8 % / 12

Make sure that you convert the interest

So 0.048/12

Then you get the interest last month so that is

2.25/ (0.048/12)

The answer is 562.5

B.$562.5

5 0
3 years ago
Other questions:
  • A circle has a diameter with endpoints (7, -7) and (5, -3). What is the equation of the circle?
    11·1 answer
  • X+56&lt;533. What is the solution of the inequality?
    12·1 answer
  • Somebody help #9 geometry
    10·1 answer
  • SHORT ANSWER PROBLEM
    14·1 answer
  • What is the difference between -6 and -3 on a number line?
    5·2 answers
  • The mean,median and mode of these sets of data:<br>A:14,12,24,36,23​
    6·1 answer
  • PLS HELP. here's ss in case anyone got confused last time lol
    12·1 answer
  • HELP WITH GEOMETRY TEST QUESTION PLEASE
    8·1 answer
  • Evaluate the function: f (x)=4x-1. Find f (5)
    14·2 answers
  • What is (f+g) (x) f(x) = -3x g(x)=-2x^2+x as a polynomial or rational function in simplest form?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!