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
vagabundo [1.1K]
3 years ago
5

Approximately how many students scored between 68 and 78 with mean 73 and standard deviation 5

Mathematics
1 answer:
Archy [21]3 years ago
4 0
We know that the standard deviation is 5 and the mean is 73. So, 68 is one standard deviation from the mean (left of the mean). While, 78 is one standard deviation away from the mean in the other direction (right of the mean).

Using a standard normal distribution (bell curve).

34% fall between 68 and 73
34% fall between 73 and 78

Therefore, 34% + 35% = 68%. 

68% of the students scored between 68 and 78, which means most of the class did average/poorly on the test. 


Side note: what helped me when I was in statistics was planting my mean and scores on the bell curve. I'll add a picture on how to do it.

You might be interested in
Ry
yanalaym [24]

Answer:

3x + 2 = y

hope it was helpful

4 0
3 years ago
Estimate by rounding each addend to the greatest place: 50,099+ 24,565=74,664 .
Contact [7]
I'm not 100% sure what you're asking, but i think it wants:

50,000 + 25,000 = 75,000 - so B is the answer

to do it you basically just round the number to the nearest 1000 and add
8 0
4 years ago
Find the value of X.
andriy [413]

Answer:

x=3

Step-by-step explanation:

All the angles added together must equal 360 degrees.

74+43+50+37+12x+12x+11x+17x = 360

Simplify the equation by adding like numbers.

204+52x=360

Subtract 204 from both sides of the equation.

204+52x-204=360-204

52x=156

Now, divide both sides by 52.

52x/52=156/52

x=3

6 0
3 years ago
Help me with this math​
stellarik [79]

Answer:

(x+2)(x+5) or if you were looking for the x-intercepts they would be -5, and -2

7 0
3 years ago
Read 2 more answers
Kwame says that the ordered pair(5,0) is on the y-axis. So you agree? Justify your answer.
RideAnS [48]

Answer:

No, the answer would be on the x-axis. This is because x=5 and y=0, which would mean that the ordered pair (5,0) would be on the x-axis.

Hope this helps!

3 0
3 years ago
Read 2 more answers
Other questions:
  • Adult red wolves vary in length from 137.16 cm to 168.64 cm. Estimate the difference in length between the longest and shortest
    10·1 answer
  • A culture of yeast doubles in size every four hours. If the yeast population is estimated to be three million now, what will it
    6·2 answers
  • Rewrite the definition “All rectangles are parallelograms” in biconditional form.
    10·1 answer
  • Find the value of x and y
    8·1 answer
  • Brainlist to who ever can answer this? 23(12/15)\25*6(3)
    9·1 answer
  • Whats an equation for this!!
    5·1 answer
  • In a sample of 60 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2. Section 05.01 Ex
    9·1 answer
  • Circle A is shown with a central angle marked 42 degrees and the radius marked 8 inches.
    12·2 answers
  • HELP PLEASE
    14·1 answer
  • Does the following relationship represent a function?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!