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
icang [17]
3 years ago
12

The GRE is an entrance exam that most students are required to take upon entering graduate school. In 2014, the combined scores

for the Verbal and Quantitative sections were approximately normally distributed with a mean of 310 and a standard deviation of 12.
What percent of scores were between 286 and 322? Round your answer to the nearest whole number.

Mathematics
2 answers:
Alexxx [7]3 years ago
6 0

Answer:

82%

Step-by-step explanation:

Data:

mean, μ = 310

standard deviation, σ = 12

We need to use the standard normal distribution table (see figures attached).

Z is calculated as follows:

Z = (x - μ)/σ

Replacing with x = 286 and x = 322:

Z = (286 - 310) / 12 = -2

Z = (322 - 310) / 12 = 1

So, we need to find:  

P(-2 ≤ Z ≤ 1) =

= P(-2 ≤ Z ≤ 0) + P(0 ≤ Z ≤ 1)

From the first table:

P(-2 ≤ Z ≤ 0) = 0.5 - P(Z ≤ -2) = 0.5 - 0.0228 = 0.4772

From the second table:

P(0 ≤ Z ≤ 1) = 0.3413

Then,

P(-2 ≤ Z ≤ 1) = 0.4772 + 0.3413 = 0.8185, which as a percentage is 0.8185*100 = 81.85% ≈ 82%

zvonat [6]3 years ago
3 0
82% of the scores will be between 286 and 322.

To find this answer, we need to find the z-scores for 286 and 322. This is done by diving the difference from the mean by the standard deviation.

(286 - 310) / 12 = -2 which gives a percent of 2.28%
(322 - 310) / 12 = 1 which gives a percent of 84.13%

Subtracting those 2 percents will tell us the difference between the two scores.

84.13 - 2.28 = 81.85% or about 82%
You might be interested in
Which inequalities are true? Choose all answers that are correct.
Fudgin [204]
A) 5 \ \textless \  -7 is false. There is no solution.
B) -3 \ \textgreater \  -1 is false. There is no solution.
C) 8 \ \textgreater \  -13 is true. It has infinite solutions.
D) -10 \ \textless \  -6 is true. It has infinite solutions. 
E) -14 \ \textless \  -15 is false. There is no solution. 
7 0
3 years ago
Rotate the following point (- 5, 7) with a 90 degree CCW rotation
Sergio039 [100]

Given:

The point is (-5,7).

To find:

The image of the given point after 90 degrees counter clockwise rotation.

Solution:

If a point rotated 90 degrees counter clockwise, then

(x,y)\to (-y,x)

Let the given point is P(-5,7). Using the above rule, we get

P(-5,7)\to P'(-7,-5)

Therefore, the image of the given point after 90 degrees counter clockwise rotation is (-7,-5).

5 0
3 years ago
Biologist created the following graph to show the relationship between the temperature of water x, and degrees Celsius, and the
PtichkaEL [24]

There is no graph but if I had to guess then I would go with answer choice C


Hope this helps!

5 0
3 years ago
Read 2 more answers
Which of the following would be the criterion for establishing similarity in the two triangles?
Luba_88 [7]

Answer:

<h3>A) Not enough information or not similar.</h3>

Step-by-step explanation:

We are given a triangle with a segment that connects two points of the two sides of given triangle.

There are different triangle similarity theorems are available there as given in options.

Side Side Side (SSS) triangle similarity theorem.

Side Angle Side (SAS) triangle similarity theorem.

Angle Angle (AA) triangle similarity theorem.

But in the shown figure, we are not provided much information about it's sides and angles.

Therefore, correct option is :

<h3>A) Not enough information or not similar.</h3>
5 0
3 years ago
6^2=?<br> What math of this
alexira [117]

Answer:

its 6th grade math but the answer is 36

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • The first quartile of the data set represented by the box plot is (8, 9, 12,14) . The median of the data set is (8, 12,16,19)
    15·2 answers
  • I'm not really good at these types of questions would really appreciate some help.
    11·1 answer
  • Frankie paid $11.75 for the movie tickets and $4.75 for popcorn and drink. How much did Frankie spend?
    7·2 answers
  • Please do questions 31-34 I need them ASAP in 2h
    9·2 answers
  • What is 70/10 equivalent fraction?
    14·1 answer
  • Fill in the table with relative frequencies by column.
    15·2 answers
  • PLEASE HELP DUE BY MIDNIGHT ILL GIVE YOU BRAINLINEST and 17 POINTS
    12·1 answer
  • Please help i’ll give brainliest
    10·1 answer
  • Help me on this question please​
    13·1 answer
  • There are 5,280 feet in a mile. What part of a mile, in decimal form, will you drive until you reach the exit?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!