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
bekas [8.4K]
3 years ago
6

Scores on the Critical Reading portion of the SAT college entrance test in a recent year were roughly Normal with mean 496 and s

tandard deviation 115. You choose an SRS of 100 students and average their SAT scores. If you do this many times, the standard deviation of the average scores you get will be close to
A. 115

B. 115 / square root of 100 = 1.15

C. 115 / square of 100 = 11.5
Mathematics
1 answer:
Sliva [168]3 years ago
5 0

Answer:

C. 115 / square of 100 = 11.5

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\sigma = 115, n = 100. So

s = \frac{115}{\sqrt{100}} = 11.5

So the correct answer is:

C. 115 / square of 100 = 11.5

You might be interested in
How do you solve this !!??(x+y+2)(y+1)
Elena-2011 [213]

Answer:

Step-by-step explanation:

(x+y+2)(y+1)

Opening the brackets

xy + x + y^2 + y +2y +2

y^2 +xy + 3y + x +2

6 0
2 years ago
12×2+7x=<br>I need help understanding why the x is there
posledela
12*2+7(x) you need to solve for x
8 0
2 years ago
What I can do after completing the course of statistics?
algol13

Answer:

You can apply for Civil services, Statistical services, and the Economic services

Step-by-step explanation:

Source: https://www.tutoreye.com/blog/what-is-the-scope-of-statistics


3 0
2 years ago
At Coffee-R-Us, Kyle’s salary is $35 per week. He also earns 75% of his weekly sales as a commission. Mona works at Coffee-4-U,
Anna007 [38]

Answer:

false

Step-by-step explanation:

3 0
2 years ago
How far from the base of the house do you need to place a 15’ ladder so that it exactly reaches the top of a 12’ wall?
FromTheMoon [43]

Answer:

3' away

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Other questions:
  • What is the common ratio between successive terms in the sequence?<br> 1.5, 1.2, 0.96, 0.768, …
    6·1 answer
  • What is the square root of 25
    14·2 answers
  • Need help ASAP !!!!
    5·1 answer
  • Suppose f(x)=x^2-1find the graph of f(3x)
    15·1 answer
  • The tables show information about the scale ratios of two different maps. 2 tables. The first table is a 2-column table with 2 r
    7·2 answers
  • Write the equation of a line that includes the point (-4 , 0) and has a slope of -3/5 in slope intercept form
    10·2 answers
  • There is a 20% sale on in Topshop. The bag I want is now £60. What was the original cost of my bag?
    11·2 answers
  • Ben kaç yasındayım<br>A 12<br>B 10<br>C 8<br>D 14​
    5·1 answer
  • Please help, it would really make my day! I’ll give branliest if it’s correct! :-)
    13·1 answer
  • Helppp meeeeeeeeeeeeeeee
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!