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
MrMuchimi
3 years ago
9

A study by the department of education of a certain state was trying to determine the mean SAT scores of the graduating high sch

ool seniors. The study examined the scores of a random sample of 238 graduating seniors and found the mean score to be 493 with a standard deviation of 97. Calculate the margin of error using the given formula. How could the results of the survey be made more accurate?
Mathematics
1 answer:
Art [367]3 years ago
7 0

Answer:

±12.323

Step-by-step explanation:

A study by the department of education of a certain state was trying to determine the mean SAT scores of the graduating high school seniors. The study examined the scores of a random sample of 238 graduating seniors and found the mean score to be 493 with a standard deviation of 97. Calculate the margin of error using the given formula. How could the results of the survey be made more accurate?

The formula for margin of Error =

±z × Standard deviation/√n

We are not given the confidence interval but let us assume the confidence interval = 95%

Hence:

z score for 95% confidence interval = 1.96

Standard deviation = 97

n = random number of samples = 238

Margin of Error = ± 1.96 × 97/√238

Margin of Error = ±12.323

You might be interested in
(12a + 8) + (4a + 3) + (5 + a) =
PSYCHO15rus [73]

Answer:

17a + 16 =

Step-by-step explanation:

Add all a's

then all numbers w/o letters

you cannot add them together bc it would be like adding apples to carrots (thats what my teacher said)

3 0
2 years ago
Write an algebraic expression that models each word phrase four more than a number b
Alisiya [41]
The answer would be the first choice 4+b
5 0
3 years ago
Which outcome is most likely after a die is rolled?
muminat

Answer:

a number less then 6 is the anser so the 1st one

5 0
2 years ago
The number of fiction books in a libary is %150 of the number of non-fiction books. the libary has 4,000 books in total. how man
Nitella [24]

Answer:

The number of

Fiction books = x = 2400 fiction books

Non fiction books = y = non fiction books

Step-by-step explanation:

Let the number of

Fiction books = x

Non fiction books = y

The libary has 4,000 books in total.

Hence: x + y = 4000........ Equation 1

The number of fiction books in a libary is %150 of the number of non-fiction books.

x = 150% of y

x = 150/100 × y

x = 1.5y

We substitute 1.5y for x in Equation 1

x + y = 4000

1.5y + y = 4000

2.5y = 4000

y = 4000/2.5

y = 1600 non fiction books

Solving for x

x = 1.5y

x = 1.5 × 1600

x = 2400 fiction books.

Therefore,

The number of

Fiction books = x = 2400 fiction books

Non fiction books = y = non fiction books

5 0
3 years ago
16. Two years of local phone service costs $883, including
Evgen [1.6K]

Answer:

The monthly fee would be $23

Step-by-step explanation:

hope it helps mark as brainllest if help!!!

3 0
2 years ago
Other questions:
  • Simplify the expression shown below:<br><br> ln(e^3 x^4), where x&gt;0
    12·1 answer
  • Fine the perimeter of this rectangle
    5·1 answer
  • What is the equation of the line given that the slope is 2 and it is going through the point (6,
    14·2 answers
  • The nine digit number that identifies the bank that a check came from is called
    14·2 answers
  • You received a 75 gift card to your favorite store to buy new shirts. if shirts cost 13.99, how many you can buy??
    7·2 answers
  • Name two examples of quadrilaterals,
    7·2 answers
  • Perpendicular bisector of segment with endpoints -2,0 and 6,12.
    6·1 answer
  • Pls help and thankssss
    8·1 answer
  • Find the value of c that completes the square for the function f(x)= x2 + 4x + C.
    8·1 answer
  • Please confirm that this awnser is right please only awnser if you are 100% sure it’s right ( I will brainlist)
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!