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
A triangle has side lengths of (3.76 + 1.7) centimeters, (1.36 + 1.1) centimeters,
pychu [463]

Answer:

Step-by-step explanation:

our triangle has one length:     3.76+1.7=5.46

                           another side: 1.36+1.1=2.46

                            last side:        7.1+5.1=12.20

Perimeter is=5.46+2.46+12.20=20.12 cm

7 0
3 years ago
Elena has 35 magazine subscriptions to sell. Each magazine subscription costs $8.50. Elena sold 17 magazine subscriptions on Fri
KengaRu [80]
Answer : The answer is $153.00 from selling magazine subscriptions on Saturday.

Explanation : We know that each magazine is equal to $8.50. At first she sold 17 of the 35 magazines. 17 x $8.50 = $144.50 from selling 17 magazines. Now we do 35-17 to get how many magazines are left. So there is 18 magazines left. We need to do the same thing we did before, 18 x $8.50 = $153.00. She got $153.00 from selling 18 magazines on Saturday.
7 0
2 years ago
SOS I NEED ANSWER RIGHT NOW SOMEONE PLEASE HELP ME :(
laila [671]

Answer:

The functions share a y intercept of -1

Step-by-step explanation:

Both functions cross the y axis and y=-1 and x=0

They both have the same y intercept

3 0
3 years ago
Help..........................
Angelina_Jolie [31]

since all of the sides are not equal, it is not a regular polygon.

a regular polygon is when all of the sides are equal, and the same with the angles.

hope this helps you!! <3

7 0
3 years ago
HELP PLEASE ASAP. What is the area of the figure?
Ratling [72]

Answer:

24

Step-by-step explanation:

5 0
2 years ago
Other questions:
  • An experiment consists of flipping a single coin followed by rolling a six-sided cube (a die).
    13·2 answers
  • PLZ HELP ME BY TONIGHT AT 12:30 ITS DUEEE <br><br> ps/ plz answer ALLL the questions
    11·1 answer
  • you and your friend share a package of candies. You eat twice as many candies as your friend. If there were 36 candies in the ba
    5·1 answer
  • What is the expression for 3 less than 3 times a muber k
    11·1 answer
  • How do i plot this??
    10·1 answer
  • How do I solve for n?​
    10·1 answer
  • 5.<br> Which picture shows a rotation of the flag?<br> (1)<br> (2)<br> (3)<br> (4)
    10·1 answer
  • Coordinates of point S????????????????????????????
    14·2 answers
  • Jada plans to serve milk and healthy cookies for a book club meeting. She is preparing 12 ounces of milk and 4 cookies per perso
    8·1 answer
  • 3. I am a cube that has a length,<br> width, and height of 1 unit.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!