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
Ierofanga [76]
3 years ago
11

SAT scores of students at an Ivy League college are distributed with a standard deviation of 250 points. Two statistics students

, Raina and Luke, want to estimate the average SAT score of students at this college as part of a class project. They want their margin of error to be no more than 25 points.(a) Raina wants to use a 90% condence interval. How large a sample should she collect?Raina should sample at least people.

Mathematics
1 answer:
Minchanka [31]3 years ago
8 0

Answer:

The sample size should be 273 students

Step-by-step explanation:

Here Raina wants to use 90% interval then

ME = z. SE

SE = s d/√n at end

ME/z   = s d/√n

n={z.sd/ME)²

Z = 1.65    =>due to  90%confidence interval

ME= 24

sd=250

putting these value in the question we get 273 students

You might be interested in
The thickness of each type of coin is shown in the table. How much thicker is a stack of a dollars worth of nickels than a dolla
il63 [147K]

Answer:

16 nickels thicker

Step-by-step explanation:

You would need 20 nickels for 1 dollar and only 4 quarters for 1 dollar.  Do 20 minus 4 and your answer is 16 nickels. The stack of nickels is 16 coins thicker. Hope this helped!

5 0
3 years ago
Which fraction is equivalent to 2/5?  <br> A. 4/10 <br> B. 2/10   <br> C. 1/2   <br> D. 4/6
Lelechka [254]
Hey there James!

So, just remember, 2/5 is almost half of 1.

When it is almost half of 1, this means that it would have to be 2.5/5

This would mean that 4/10 would be your answer, because it is almost half of 1 also.

Hope this helps.
6 0
3 years ago
A giraffe can run about 14 meters per second. Find it's speed in miles per hour
Inga [223]
(14 meter/sec) x (1 mile/1609.344 meter) x (3,600 sec/hour) =

                         (14 x 3600) / (1609.344) = <em>31.32 mile/hour  </em>(rounded)
4 0
3 years ago
Work out 140-3^2×(8+4)+6÷2
kiruha [24]

Answer:

140 - 9 (12) + 3

140 - 108 +3

140 - 111

= 29

4 0
3 years ago
Emil bought a camera for $268.26, including tax. He made a down payment of $12.00 and paid the balance in 6 equal monthly paymen
PIT_PIT [208]
Make an equation:
6x + 12 = 268.26
6x = 256.26
X = $42.71
The monthly payment is $42.71
5 0
3 years ago
Other questions:
  • If Hannah ride a bike for 6mile per minute.how many miles can she ride in 10 Minutes
    7·1 answer
  • Round your answers to the nearest hundredth
    11·1 answer
  • 5. How many linear ft of fencing will you need for a dog pen that is 5 ft by 8 ft?
    11·1 answer
  • Liam had $250. Then, he and his classmates bought a present for their teacher, evenly splitting the $120 among the e of them. Ho
    8·2 answers
  • What is the answer to this problem. X+y=2<br> X-y=-10
    9·1 answer
  • If f(x) = x-6 and g(x)=x1/2(x+3)and g(x)Xf(x)<br> please help me
    9·1 answer
  • Tayler claims that when a linear equation is written in general form, Ax + By+ C = 0, the
    11·1 answer
  • Which point in the coordinate plane represents the number 7+5i in the complex plane?
    14·1 answer
  • What value of m makes this equation true?
    11·1 answer
  • Helpppppppppppppppppppppppp
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!