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
Mice21 [21]
3 years ago
14

Suppose the test scores of students in a class are normally distributed with a mean of 86 and a standard deviation of 4. What is

the z-score for a student that scored 76 on a test? A.−4 .−2.5 C.2.5 D.4
Mathematics
1 answer:
WARRIOR [948]3 years ago
4 0

Answer:

-2.5

Step-by-step explanation:

Here in this question, we are interested in calculating the z-score for a student that had a particular mark at the test

To calculate the z-score, we need to use a mathematical formula

Mathematically;

z-score = (x - mean)/SD

From the question;

x = 76

mean = 86

standard deviation SD = 4

Plugging these values in the equation, we have;

z-score = (76-86)/4 = -10/4 = -2.5

You might be interested in
The teacher said that both equations were correct. Explain why?
anyanavicka [17]
Because they are the same equation, just rewritten in a different way.

s = 4p

divide both sides by 4 to get the other equation:
(1/4)s = p


5 0
2 years ago
The mass of the Earth is 5.972x10^24 kg. the mass of the moon is 7.3 x 10^22kg. find the total mass, in kg, of the Earth and the
torisob [31]

Answer:

6045000000000000000000000 kg.

Step-by-step explanation:

We have been given that the mass of Earth is 5.972\times10^{24} kg. The mass of the Moon is 7.3\times10^{22} kg.

To find the total mass we will add mass of Earth and Moon.

First of all let us convert the given masses in standard form.

5.972\times10^{24}=5972000000000000000000000  

7.3\times10^{22}=73000000000000000000000

5.972\times10^{24}+7.3\times10^{22}  

5972000000000000000000000+73000000000000000000000

6045000000000000000000000

Therefore, the mass of Earth and Moon is 6045000000000000000000000 kg.

8 0
2 years ago
Can all quadrilaterals be inscribed in a circle? Explain
-BARSIC- [3]
Depends of the size of the quadrilateral in relation to the circle, but otherwise, yes
3 0
3 years ago
Jason is painting a large circle on one wall of his new apartment. The largest distance across the circle will be 8 feet. Approx
Hunter-Best [27]

Answer:

a) 50.24 ft²

b) 150.72 ft²

Step-by-step explanation:

Jason is painting a large circle on one wall of his new apartment. The largest distance across the circle will be 8 feet.

The distance across a circle is also called a diameter, Hence,

D = Diameter = 8 ft

The Area of a circle = πr²

r = Diameter/2 = 8ft/2 = 4ft

π = 3.14

Hence,

The Area of the circle = π × (4 ft)²

= 50.24 ft²

a) Approximately the amount of wall the circle will cover is 50.24 ft².

b) How much area will he cover if he painted a circle on three walls?

This is calculated as:

1 wall = 50.24 ft²

3 walls = x

Cross Multiply

x = 3 × 50.24 ft²

x = 150.72 ft²

7 0
3 years ago
How many unit cubes will fit in the rectangular prism? <br> A) 9 B) 36 C) 40 D) 45
antiseptic1488 [7]

Answer:

D) 45

Step-by-step explanation:

5 x 3 x 3 = 45

8 0
2 years ago
Other questions:
  • Help me!!!!!!!!!!!!!!
    6·2 answers
  • 47 118 129 165 168 205 233 235 237 279 287 296 307 308 338 378 384 400 402 402 403 416 451 478 480 493 519 541 567 579 598 615 6
    10·1 answer
  • Josh will take 10 tests in 5 weeks at school. How many tests will we have taken after 7 weeks?
    11·1 answer
  • What the inverse of y= 100 - x^2
    11·1 answer
  • Which equation describes how the parent function, y=x^3, is vertically stretched by a factor of 4?
    13·1 answer
  • A solid aluminum cube has sides each of length L . A second cube of the same material has sides four times the length of the fir
    14·1 answer
  • PLEASE HELP Give CORRECT answer will give points and mark brainliest
    15·1 answer
  • A box of 12x12 tile contains 12 square feet. the bathroom has 39 sq feet. how many boxes are needed for job
    13·1 answer
  • Solve for m <br> m+7=3+m+4
    12·1 answer
  • At a concession stand, seven hot dog(s) and four hamburger(s) cost $21:25, four hot dog(s) and seven hamburger(s) cost $22.75 Fi
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!