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
navik [9.2K]
3 years ago
11

In a large statistics class, the correlation between midterm scores and final scores is found to be nearly 0.50, every term. The

scatter diagrams are football-shaped. Predict the percentile rank on the final for a student whose percentile rank on the midterm is a) 5% b) 80% c) 50% d) unknown

Mathematics
1 answer:
xenn [34]3 years ago
6 0

Answer:

A) 21%

B) 66%

C) 50%

D) 50%

Step-by-step explanation:

A) We want to find the percentile rank on the final for a student whose percentile rank on the midterm is 5%.

Now, it means we are looking for the value of z on the 5th percentile.

Now from the Z-score percentile normal distribution table i have attached, the value of z on the 5th percentile is; Zx = -1.645

Now, using the regression method, we know that;

Zy = r(Zx)

Where Zy is the score at which the final percentile occurs.

And r = 0.5 from the question

Thus; Zy = 0.5 x -1.645

Zy = - 0.8225

Now looking at the table attached, there is no direct value of -0.8225,and so we pick the closest to it which is -0.8 and it falls on the 21st percentile.

Thus, the percentile rank on the final for a student whose percentile rank on the midterm is 5% would be 21%.

B) We want to find the percentile rank on the final for a student whose percentile rank on the midterm is 80%.

Following same pattern in A above;

From table, Zx = 0.842

And Zy = 0.5 x 0.842 = 0.421

The percentile for this value is approximately 66th percentile.

Thus, the percentile rank on the final for a student whose percentile rank on the midterm is 80% would be 66%.

C)We want to find the percentile rank on the final for a student whose percentile rank on the midterm is 50%.

Following same pattern in A above;

From table, Zx = 0

And Zy = 0.5 x 0 = 0

The percentile for this value is 50th percentile.

Thus, the percentile rank on the final for a student whose percentile rank on the midterm is 50% would be 50%.

D) If the score is unknown, the best bet will be to use a middle percentile of 50%.

It thus follows the same procedure from c above and same answer of 50%.

You might be interested in
If FG=10 and HJ = 10. Which additional facts guarantee that FGHJ is a parallelogram? check all that apply.
Kamila [148]
Yes, if FJ || GH, and also if FG || HJ, since a parallelogram has two pairs of parallel sides.

now, we know FG = HJ = 10, but if it's a parallelogram, then the other two sides must also have the same length, so chances are FJ = GH = 15.
5 0
2 years ago
Which of the following does NOT show an identity property?
DerKrebs [107]
2+1=3 is not an identity property. The rest are because the value equals itself after dividing, subtracting, and multiplying.
6 0
3 years ago
Read 2 more answers
1. What is the y-intercept in the table below?
11Alexandr11 [23.1K]

Answer:

EWAN KO DYA DI AKO MATH EXPERT

Step-by-step explanation:

POIU

5 0
2 years ago
I’m please help asap due soon
Akimi4 [234]
The answer is 51. Hope this helps
3 0
2 years ago
Please give me answer ASAP
ankoles [38]

Answer: the docx isn’t working so I can’t answer it

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • ABC IS a right angled triangle at B and D is a point on BC. If AD=18cm , BD=9cm and CD = 4 cm, find AC
    15·1 answer
  • 3. Which brand of maple syrup is a better buy
    11·1 answer
  • How do i solve the linear system -14x+15y=15 21x-20y=-10 using elimination
    9·1 answer
  • Explain why a positive times a negative is a negative number.
    10·1 answer
  • Use a truth table to verify the first De Morgan law (p ∧ q)’ ≡ p’ ∨ q’.
    12·1 answer
  • The zeros of a function are the values of x x for which the function is equal to zero. Enter a number in each blank to make true
    11·1 answer
  • Question 1 : Match the Term with the correct Definition
    15·1 answer
  • Kieran made 42 pizzas while working 7 hours at Sam's. If Kieran has made
    15·1 answer
  • Find mZCBA.<br> A<br> B<br> 49°<br> с
    14·1 answer
  • Solve number 8 please
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!