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
tiny-mole [99]
3 years ago
8

The average score on a standardized test is 500 points with a standard deviation of 50 points. What is the probability that a st

udent scores more than 400 on the standardized test?
Mathematics
1 answer:
Charra [1.4K]3 years ago
5 0
The average score is 500 points and the standard deviation is 50 points.Mean - 2 SD = 500 - 2 * 50 = 500 - 100 = 400It means that more than 400 on the standardized test is more than: Mean - 2 Standard deviations.For the Normal distribution: 100% - 2.5 % = 97.5% = 0.975.Answer: The probability that student scores more than 400 points is 0.975.  

You might be interested in
It takes 2 hours to drive 80 miles and 4 hours to drive 160 miles. Find the rate of change. I need this asap
natita [175]

Answer:

40 miles per hour

Step-by-step explanation:

80 divided by  2 is 40

160 divided by 4 is 40

5 0
3 years ago
Jack Lawler, a financial analyst, wants to prepare an article on the Shadow Stock portfolio developed by the American Associatio
-BARSIC- [3]
Last one of the first one try the last one first
4 0
2 years ago
Which is a needed step to prove that AABF = AEDG?
Gwar [14]

Answer: helllloooooooooooooo000000oooo

Step-by-step explanation:

7 0
3 years ago
Use the discriminant to determine the number and type of solutions the equation has.
lidiya [134]
Discriminant = square root (b^2 -4*a*c)
square root (64 -4*1*12) =
square root (16) =
4
Therefore it has 2 rational soltions


4 0
3 years ago
The mean of 4 numbers is 21. calculate the sum of the 4 numbers
Ugo [173]

Answer:

84

Step-by-step explanation:

The mean is calculated as

mean = \frac{sum}{count} , then

\frac{sum}{4} = 21 ( multiply both sides by 4 )

sum = 84

8 0
3 years ago
Other questions:
  • Can someone help me with this
    14·1 answer
  • Write the ordered pair that represents yz. Then find the magnitude of yz . y=14,-23 z=23,-14
    15·2 answers
  • Use the graph below to find L' after L(0, 0) was reflected over the line y = -4
    14·1 answer
  • The question I have is this 90+30+a=180
    15·2 answers
  • Find h(g(n)) when h(n) = 2n + 5<br> and g(n) = n +4
    7·1 answer
  • Can a triangle be formed if the side<br> lengths are 10, 23, and 10?
    15·2 answers
  • How do you simplify 4³​
    8·1 answer
  • If 10 oranges cost 2.00 and 8 oranges cost 1.20 which is the better deal
    7·1 answer
  • Graph the function with the given domain. Then identify the range of the function. y = -6; domain: x ≥ 5
    9·2 answers
  • Help 100 Points + brainlest math
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!