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
Mnenie [13.5K]
2 years ago
14

In a random sample of 250 students, 150 were in favor of longer hours at the school library. At 98% level of confidence, what is

the margin of error?
Select one:

0.051


0.080


0.065


0.072


0.078


0.061
Mathematics
1 answer:
Wewaii [24]2 years ago
3 0

0.072 is the margin of error.

<h3>What is standard error?</h3>

The standard error (SE) of a statistic is the standard deviation of its sampling distribution or an estimate of that standard deviation.

According to the question,

In a random sample of 250 students,

p= 0.98 (or 98%) were in favor of longer hours at the school library.

The standard error of p(the sample proportion) is (approximately)

The standard error of p =   \sqrt{\frac{p(1-p)}{n} }

p = 0.98

1 - p = 1 - 0.98 = 0.02

Here,

n = 250

The standard error of p =   \sqrt{ \frac{0.98 (0.02) }{250}

The standard error of p ≈   0.072

Therefore,

The margin of error is 0.072.

Learn more about is standard error here:

brainly.com/question/14524236

#SPJ1

You might be interested in
What value of x makes this equation true?<br> 5-2(x + 8) = 6x + 7
zhuklara [117]

Answer:

x = negative 9/4

Step-by-step explanation:

-2x-11=6x+7

-2x-11+11=6x+7+11

-2x=6x+18

-2x-6x=6x+18-6x

-8x=18

4 0
3 years ago
A type of bar graph that shows continuous data and the frequency of the data in equal intervals
Readme [11.4K]
Histogram is your answer 
7 0
3 years ago
Read 2 more answers
In a recent year, a sample of grade 8 Washington State public school students taking a mathematics assessment test had a mean sc
Daniel [21]

Answer:

The  number is  N  =1147 students

Step-by-step explanation:

From the question we are told that

    The population mean is  \mu  =  281

     The standard deviation is  \sigma  =  34.4

    The sample size is  n = 2000

percentage of the would you expect to have a score between 250 and 305 is mathematically represented as

      P(250 <  X <  305 ) =  P(\frac{ 250 - 281}{34.4 }  <  \frac{X - \mu }{\sigma }  < \frac{ 305 - 281}{34.4 }   )

Generally  

             \frac{X - \mu }{\sigma }  =  Z  (Standardized \ value \  of  \  X )

So  

         P(250 <  X <  305 ) =  P(-0.9012<  Z

       P(250 <  X <  305 ) = P(z_2 < 0.698 ) -  P(z_1 <  -0.9012)

From the z table  the value of  P( z_2 < 0.698) =  0.75741

                                         and  P(z_1 < -0.9012) =  0.18374

     P(250 <  X <  305 ) = 0.75741 - 0.18374

      P(250 <  X <  305 ) =  0.57

The  percentage is  P(250 <  X <  305 ) =  57\%

The  number of students that will get this score is

           N  = 2000 * 0.57

           N  =1147

6 0
3 years ago
Can someone help please?????
frutty [35]
The answer is 13 you have to add the top and bottom
8 0
3 years ago
Easy math please help
insens350 [35]

1) False

Adjacent angles must share a common side/ray.

2) B and D

Adjacent angles are those that are directly next to each other and share a common side.

3) C

Angles 1 and 2 are congruent. Angles 3 and 4 are congruent. Both of these pairs have angles that are opposite each other.

4) B

Angles 1 and 2 add up to 180. Angles 3 and 4 add up to 180. Both of these pairs of angles are supplementary.

5) A

These angles are directly next to each other and share a common side.

Hope this helps!! :)

4 0
2 years ago
Other questions:
  • What is 2/10 in simplest form
    5·2 answers
  • Part D
    9·1 answer
  • If f(x)=4x-1 and g(x)=x^2+7 ,find G(f(x))
    10·1 answer
  • If the legs of a right triangle are given by x2 - y2 and 2xy, then which expression equals the hypotenuse? choose all that apply
    9·1 answer
  • 2x+9=3x+1 what does x equal
    11·2 answers
  • There are 75 students in a speech contest. Yesterday 1/5 of them gave their speech. Today, 3/5 of the remaining students gave th
    14·1 answer
  • Please find the length of AB. :)
    13·1 answer
  • . The Bakers Dozen bakery sells apple, cherry, and pumpkin pies.Yesterday, the bakery sold 14 more apple pies than cherry pies a
    5·2 answers
  • What is the greatest possible percent error in calculating the volume of a box measured to the nearest inch with sides of 5 in,
    7·1 answer
  • An above ground pool is shaped like a cylinder. It is 5.5 feet tall and has a diameter of 20 feet. If the pool is filled to 5 fe
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!