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
Musya8 [376]
3 years ago
10

SAT scores are distributed with a mean of 1,500 and a standard deviation of 300. You are interested in estimating the average SA

T score of first year students at your college. If you would like to limit the margin of error of your 98% confidence interval to 40 points, at least how many students should you sample?
Mathematics
1 answer:
kotegsom [21]3 years ago
3 0

Answer:

I should use at least 304 students

Step-by-step explanation:

Margin error (E) = t × sd/√n

E = 40

sd = 300

confidence level (C) = 98% = 0.98

significance level = 1 - C = 1 - 0.98 = 0.02 = 2%

t-value corresponding to 2% significance level and infinity degree of freedom is 2.326

n = (t×sd/E)^2 = (2.326×300/40)^2 = 17.445^2 = 304 (to the nearest integer)

You might be interested in
Find the slope of the line
Anvisha [2.4K]
The slope of the line is 5
3 0
2 years ago
Pls help asap..thank you!
tia_tia [17]

Answer:

5.25

Step-by-step explanation:

If CD is perpendicular to AB, a right angle is formed by the perpendicular lines at the base of the triangle. If we know that AB is 3 we can divided that by two to use half the triangle and create a right trianle with a base of 1.5 (half of 3) a height of rad 3 now all we have to do is use P-Thags to find AC which is the hypotenuse. After doing 1.5 squared + rad 3 squared = ac squared you will get the answer of AC = 5.25

7 0
3 years ago
Read 2 more answers
Find the slope of the line passing through the points of (3,-5) and (-9,-6)
slavikrds [6]

Answer:

1

m = ---

12

Step-by-step explanation:

The formula is y2-y1

---------

x2-x1

(x1,y1) (x2,y2)

(3,-5) (-9,-6)

You get the 2 Y's and subtract them

Do the same with the X's

Y's above , X's below

(y2- y1)

⬇

-6-(-5) -1 1

--------- = ---- = ---- = m

-9-(3) -12 12

⬆

(×2- x1)

This equation is backwards, thats why it was harder to understand. (-9,-6) is farther left and below point (3,-5), making it the REAL first point in the equation.

5 0
3 years ago
Rosita earned $325 for working 25 hours last week. What is her hourly rate?
miskamm [114]

Answer:

13

Step-by-step explanation: 325/25=13

8 0
3 years ago
Read 2 more answers
Noooooooo Liiiiiiiinnnnnkkkkksssssss... Tanisha and Bess are. Tanisha is half as old Bess. Bess is 6 years older than Tanisha.
goblinko [34]
The answer is D. Tanisha is 6, Bess is 12
5 0
2 years ago
Other questions:
  • joe bought a television for $286.26, includingbl tax. he made a down payment of $100.00 and paid the balance in 6 equal mouthly
    12·1 answer
  • How would u solve 7c + 12 = -4c + 78
    7·1 answer
  • What is the volume of a sphere with a diameter of 4 meters? (Use 3.14 for π.)
    7·1 answer
  • A peicewise function h(x) is shown on the graph below. what is the value of h(x) = -3?
    8·1 answer
  • Please answer this correctly
    7·2 answers
  • In the function y = 10.00x + 35, y represents the cost of cabin lodging per occupant and x represents the number of occupants. H
    9·1 answer
  • Write the equation in point-slope
    13·1 answer
  • Help me out?? thank you so much whoever does!!
    15·1 answer
  • Collect like terms<br>d+ d +d​
    11·2 answers
  • Find the GCF.<br><br> 18c3 and 24c3
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!