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
Gemiola [76]
2 years ago
11

The scores on an entrance exam to a university are known to have an approximately normal distribution with mean 65% and standard

deviation 7.1%. Using the normalcdf function on your graphing calculator, what percentage of students would score 70 or better on this entrance exam?
A. 28.4%
B. 18.9%
C. 24.1%
D. 22.3%
Mathematics
1 answer:
emmasim [6.3K]2 years ago
4 0

Answer:

The correct answer is - C. 24.1%

Step-by-step explanation:

Given:

mean μ = 65%

standard deviation δ = 7.1 %

solution:

Prob( X>70) = 1 - Prob(x<70)  

= P (x-μ/δ ≥ 70 -65/7.1)

= 1 - Prob( (70-65)/7.1)

= 1 - Prob ( z < 0.7042553)

= 0.24065

the percentage of students scoring 70 or more in the exam

= 24.065*100

= 24.1%

You might be interested in
Jsjjss pls help its uRGeNT
Sedaia [141]

Answer: y=7x

Step-by-step explanation:

The way I did it was, I looked at the chart. The highest it goes is 30 and 210. So for your answer, you have to multiply. 7x30 gives you 210 and there y=7x

5 0
3 years ago
PLEASE HELP!!!!!! ILL GIVE BRAINLIEST *EXTRA 40 POINTS** !! DONT SKIP :((
Marina CMI [18]

Answer:

No. 1st is (0,2) 2nd is (0,5)

Step-by-step explanation:

3 0
2 years ago
three apples and four bananas cost $4.85 . three apples and ten bananas cost $8.75.Find the cost of an apple.
konstantin123 [22]
8.75-4.85= 3.90= cost of 6 bananas
3.9/6=0.65= cost of one banana
.65*4=2.60= cost of 4 bananas
4.85-2.60= 2.25= cost of 3 apples
2.25/3=.75= cost of an apple
5 0
3 years ago
Read 2 more answers
A number is greater than or equal to -4<br>​
Trava [24]
It depends on the number
6 0
1 year ago
Read 2 more answers
Which of the following equations has a consant of proptionality of 4
EleoNora [17]
The answer to the question is C
6 0
2 years ago
Other questions:
  • Note the graph of an athletes performance after finishing a triathlon. The x-axis measures time in hours, and the y axis measure
    6·2 answers
  • Barbara sells iced tea for $1.49 per bottle and water for $1.25 per bottle. She wrote an equation to find the number of drinks s
    12·2 answers
  • Divide -3x3 - 2x2 - x - 2 by x – 2.
    9·2 answers
  • Find the area of the figure
    9·1 answer
  • You might need:
    6·2 answers
  • David is standing 500 feet away from the base of a cell phone tower. The angle of elevation from his eyes to the top of the towe
    11·1 answer
  • Ms. Holmstrom set up a math problem to find out how much money her class spends for lunches at the cafeteria for over a 2-day pe
    6·1 answer
  • the area of the green square is 21% greater than the area of the yellow square l. workout the ratio a:b
    12·1 answer
  • James had 568 books to put into 9 boxes. How many boxes were in each box ?Where there any book left that needs another box?
    5·1 answer
  • Campbell has saved $28. He needs $70 to buy a new skateboard. What decimal value is equivalent to the fraction of the cost that
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!