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
galina1969 [7]
3 years ago
6

The scores of the students on a standardized test are normally distributed, with a mean of 500 and a standard deviation of 110.

What is the probability that a randomly selected student has a score between 350 and 550
Mathematics
1 answer:
Gnesinka [82]3 years ago
8 0

Answer:

The probability that a randomly selected student has a score between 350 and 550  = 0.5867

Step-by-step explanation:

Mean (\nu ) = 500

Standard deviation (\sigma  ) = 110

Let X be the score of student in a standardized test

The probability that a randomly selected student has a score between 350 and 550  =

P(350< X< 550)  = P(\frac{ 350 - 500 }{110 }< \frac{ X - \nu }{\sigma  }< \frac{  550 - 500 }{110 } )

                              = P(- 1.36< Z< 0.45  )       Putting   (Z =\frac{ X - \nu }{\sigma  })

                              = (Z< 0.45) - (Z< -1.36)

                              = 0.6736 - .0869     ( Using Z table )

                              = 0.5867

You might be interested in
Please help me answer this for me please
slamgirl [31]

Answer:

first one is 5.8

second on is 4.47 round

third one is 1.92

Step-by-step explanation:

8 0
3 years ago
GUYS PLEASE HELP ME I REALLY DON'T UNDERSTAND THIS TASK!!!!!!! IT'S VERY IMPORTANT FOR ME!!!!! DISTANCE BETWEEN TWO TOWNSHIPS, E
Dimas [21]
For this problem, you know that the first walker will arrive 2 hours before the second, and increases his speed by 2 times the second walker. You also know there is a distance of 24 km. So up until some time x, the two walkers have to be going the same speed. If the first walker increases speed by two times the speed per hour, and arrives two hours earlier, then his initial speed will be 20 km/h, because after 2 hours, he will have an increase of 4 km/hr, and the second will have an increase of 2 km/h, thereby making the first arrive 2 hours earlier, if that makes sense.
5 0
3 years ago
What is the absolute value of 6.75?
dusya [7]
6.75 is the absolute value of 6.75 absolute value is distance from zero and 6.75 is 6.75 from 0 so is -6.75
6 0
3 years ago
Read 2 more answers
(3x+36)^2<br> can anyone please answer i don’t understand how to do this
pav-90 [236]
Expand the EXPRESSION 
9x^2+216x+1296
7 0
3 years ago
I need help i don’t understand this
lys-0071 [83]
Answer:
Angle BAC: 56
ANGLE BCA: 42

Why? First find angle BCA because that angle is on a straight line with another angle on the other side you can do
180-138=42 which is the measurement of angle BCA.

For angle BAC you have to know that the sun of all triangles interior angles is 180 so you do
180-82-42=56
So angle BAC is 56

Hope this helps :D
6 0
3 years ago
Read 2 more answers
Other questions:
  • Can someone please help me?
    13·1 answer
  • What did you guys get for all of these?<br> I’ll give you 30 points If you’re able to answer all.
    10·1 answer
  • As indicated below, write the equation of the line passing through the point (2,2) and perpendicular to the line whose equation
    8·1 answer
  • Is 4.47 a rational number
    11·1 answer
  • Running around a track 4 times is 10,560 feet. How many miles would a person run if they make the four laps?
    8·1 answer
  • Are 5(8y - 8) and 40y - 40 equal?​
    10·1 answer
  • A triangle has an read of 230.86 square inches the height of the triangle is 23,8 inches what is the length of the base of the t
    10·1 answer
  • Jane’s starting annual salary is $45,520. At the beginning of each new year, she receives a $1,580 raise. What will her salary b
    12·1 answer
  • How can i simplify 8(3x + 8)
    11·2 answers
  • Select the graph for the solution of the open sentence. Click until the correct graph appears. 5|x| + 3 &lt; 18
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!