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
telo118 [61]
2 years ago
14

Many states assess the skills of their students in various grades. One of the tests provided by a national association assesses

the reading skills of 12th-grade students. In a recent year, the national mean score was 286 and the standard deviation was 38. Assuming that these scores are approximately Normally distributed, N(286, 38), use the 68-95-99.7 rule to give a range of scores that includes 95% of these students.
Mathematics
1 answer:
Alik [6]2 years ago
3 0

Answer:

95% of these scores are between 210 and 362.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 286, Standard deviation = 38

Use the 68-95-99.7 rule to give a range of scores that includes 95% of these students.

This is within 2 standard deviations of the mean. So

286 - 2*38 = 286 - 76 = 210

286 + 2*38 = 286 + 76 = 362

95% of these scores are between 210 and 362.

You might be interested in
How do you simplify 4 to the second power
andrew-mc [135]
You simplify it by solving it which means it's 4x4 which equals 16 so the answer is 16
3 0
3 years ago
Read 2 more answers
Do you know what the answer is to this question
RUDIKE [14]
Use subsiution]
y=-3x+5
subsitute -3x+5 for y in second equation
5x-4(-3x+5)=-3
distribute
5x+12x-20=-3
add like terms
17x-20=-3
add 20 to both sides
17x=17
divide both sides by 17
x=1
now subsitute 1 for x
y=-3x+5
y=-3(1)+5
y=-3+5
y=2


x=1
y=2
4 0
3 years ago
Which of the following expressions has a value of 3? Select all that apply.
Tpy6a [65]
It would be (-1)(-3) :))
7 0
2 years ago
Carol's book collection contains 12 mysteries, 8 biographies, and 5 plays.
Ne4ueva [31]

Answer:

8:25

Step-by-step explanation:

Theres 8 biography books and 25 books in total. 8:25

:D

5 0
3 years ago
That’s what I need to know to set it up plzzzzss help
AURORKA [14]
3×(60+7)
(3×30) + (3×7)
90 + 21 = 111
7 0
3 years ago
Read 2 more answers
Other questions:
  • Pam and Chris found a home for which they would have to borrow H dollars. If they take out a 25-year loan with monthly payment M
    8·1 answer
  • Choose the correct answer below.
    10·1 answer
  • 8(5-32) equal to and explain <br> please help
    6·2 answers
  • Find the value of angle M. HELP ME PLEASE!!
    5·1 answer
  • Which angle is complementary to
    8·2 answers
  • Identify the image of XYZ for a composition of a 300° rotation and a 60° rotation, both about point Y
    8·1 answer
  • Plz Help!! <br><br> Factor the Polynomial: -6x² - 15x + 9
    5·2 answers
  • What is the coefficient in the expression 4x + 2 <br>O2<br>O4<br>Ox<br>O+​
    9·1 answer
  • I’ll give points + brainalist for he correct answer (:
    7·1 answer
  • Whats the answer for this
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!