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
shepuryov [24]
3 years ago
15

ANSWER PLEASE

Mathematics
2 answers:
saveliy_v [14]3 years ago
8 0

Answer:

Step-by-step explanation:4/0

SSSSS [86.1K]3 years ago
7 0

Answer:

5/8

Step-by-step explanation:

You might be interested in
I don’t understand what it is telling me to do
viktelen [127]

Answer:

multiply     can u make me the brainliest

Step-by-step explanation:

3 0
3 years ago
Suppose the expected tensile strength of type-A steel is 103 ksi and the standard deviation of tensile strength is 7 ksi. For ty
ExtremeBDS [4]

Answer:

a

i So  the approximate distribution of \= X is \mu_{\= X} =103 and  \sigma_{\= X} = 0.783

ii So the approximate distribution of \= Y is \mu_{\= Y} =105 and  \sigma_{\= Y} = 0.645

b

 the approximate distribution of  \=X  - \= Y is E (\= X - \= Y)  = -2 and  \sigma_{\= X  - \=Y}=1.029

Here we can see that the mean of the approximate distribution is negative which tell us that this negative value of the  data for  \=X  - \= Y sample   are more and their frequency occurrence is higher than the positive values  

c

the value of  P(-1 \le \=X - \= Y  \le 1) is = -0.1639    

Step-by-step explanation:

From the question we are given that

       The expected tensile strength of the type A steel is  \mu_A = 103 ksi

        The standard deviation of type A steel is  \sigma_A = 7ksi

         The expected tensile strength of the type B steel is \mu_B = 105\ ksi

            The standard deviation of type B steel is  \sigma_B = 5 \ ksi

Also the assumptions are

       Let \= X be the sample average tensile strength of a random sample of 80 type-A specimens

Here n_a =80

      Let \= Y be  the sample average tensile strength of a random sample of 60 type-B specimens.

  Here n_b = 60

Let the sampling distribution of the mean be

             \mu _ {\= X} = \mu

                   =103

 Let the sampling distribution of the standard deviation be

               \sigma _{\= X} = \frac{\sigma }{\sqrt{n_a} }

                     = \frac{7}{\sqrt{80} }

                    =0.783

So What this mean is that the approximate distribution of \= X is \mu_{\= X} =103 and  \sigma_{\= X} = 0.783

For \= Y

 The sampling distribution of the sample mean is

               \mu_{\= Y} = \mu

                    = 105

  The sampling distribution of the standard deviation is

               \sigma _{\= Y} = \frac{\sigma }{\sqrt{n_b} }

                    = \frac{5}{\sqrt{60} }

                    = 0.645

So What this mean is that the approximate distribution of \= Y is \mu_{\= Y} =105 and  \sigma_{\= Y} = 0.645                      

Now to obtain the approximate distribution for \=X  - \= Y

               E (\= X - \= Y) = E (\= X) - E(\= Y)

                                =  \mu_{\= X} - \mu_{\= Y}

                                = 103 -105

                                = -2

The standard deviation of \=X  - \= Y is

               \sigma_{\= X  - \=Y} = \sqrt{\sigma_{\= X}^2 - \sigma_{\= Y}^2}

                         = \sqrt{(0.783)^2 + (0.645)^2}

                         =1.029

Now to find the value of  P(-1 \le \=X - \= Y  \le 1)

  Let us assume that F = \= X - \= Y

    P(-1 \le F \le 1) = P [\frac{-1 -E (F)}{\sigma_F} \le Z \le  \frac{1-E(F)}{\sigma_F} ]

                             = P[\frac{-1-(-2)}{1.029}  \le  Z \le  \frac{1-(-2)}{1.029} ]

                             =  P[0.972 \le Z \le 2.95]

                             = P(Z \le 0.972) - P(Z \le 2.95)

Using the z-table to obtain their z-score

                             = 0.8345 - 0.9984

                             = -0.1639

                   

3 0
3 years ago
-5s-5x+5 s 50<br> solve this
Bingel [31]

-5s-5x+5s+50     Combine like terms

5x+50

8 0
3 years ago
Read 2 more answers
2−6(−5t+1)
VashaNatasha [74]

Answer: I don't think any of those choices are correct.

Step-by-step explanation:

2-6*-5t+6

6*-5t+4

<h3>-30t+4</h3>
6 0
3 years ago
Read 2 more answers
Is 0.047 1/100 of 4.70
LiRa [457]

Answer:

Yes!

Step-by-step explanation:

4.70 (1/100) = 4.70(.01) = .047

6 0
3 years ago
Read 2 more answers
Other questions:
  • Solve this equation using the most direct method: 3x(x + 6) = -10 Enter your solution in the exact, most simplified form. If the
    13·1 answer
  • Please I need this quick
    5·2 answers
  • What is the median of the data set represented by the dot plot?
    10·2 answers
  • Maths Aryabhatta
    10·2 answers
  • Nate is saving up to purchase a new computer. He has $175 already and can 1 point save $20 per month. How long will it take him
    10·1 answer
  • Someone help please and make sure the answer is right :)
    10·2 answers
  • Pleasee help me answer this geometry question !!
    5·1 answer
  • Solve for x.<br> x/3 + 2=16
    13·2 answers
  • (100 points!!!!!)
    9·1 answer
  • Can anyone help me find the area pls ty
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!