![juliabochkarev](/avatars/22630.jpg)
juliabochkarev
14.03.2020 •
Mathematics
Scores on the Critical Reading portion of the SAT college entrance test in a recent year were roughly Normal with mean 496 and standard 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
Solved
Show answers
More tips
- L Leisure and Entertainment Learn How to Knit with Needles: A Simple Guide for Beginners...
- C Computers and Internet Best Antivirus: How to Choose Protection for Your Computer?...
- L Legal consultation What Documents Are Required for a Russian Passport?...
- S Sport How to Choose Tennis Rackets?...
- H Health and Medicine AKDS Vaccination: Ensure Your Child s Safety...
- H Health and Medicine Naskol ko Opasen Ukus Kleshcha i Kak Ego Raspoznat...
- C Computers and Internet How to Delete Your Account on Odnoklassniki...
- H Health and Medicine What to Do When Your Jaw Locks Up?...
- G Goods and services What Are the Most Popular Services?...
Answers on questions: Mathematics
- M Mathematics Choose the correct algebraic expression for the situation: 35 divided by a number d...
- M Mathematics Here is part of a train timetable - check picture....
- M Mathematics Which expression is equivalent to 3 the 5th power?...
- M Mathematics 3x^2- 10x - 8 please help with this...
- M Mathematics David and his 2 children are going to the zoo. The administration price is Adult:£60 Children:£67 FAMILY DISCOUND CARD GIVES 1/5 off adults price 60% off child price Work out the total...
- M Mathematics If 4 cooks can prepare a buffet in 15 mins how long would it take 6 cooks...
- M Mathematics Find the equation of the line that is perpendicular to the equation below that passes through the point (5,3)...
- M Mathematics A loan of $7,000 was approved for 36 weeks. Total amount (principal and interest) was paid as S 7388 charged with an 8% annual rate of interest....
- M Mathematics Factorise fully 3x - 9x 4x² + 28x...
- M Mathematics Solve 5n +3 27 sorry I’m not the best at maths so simple stuff like this makes my brain buffer...
Ответ:
C. 115 / square of 100 = 11.5
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a random variable X, with mean
and standard deviation
, the sample means with size n of at least 30 can be approximated to a normal distribution with mean
and standard deviation ![s = \frac{\sigma}{\sqrt{n}}](/tpl/images/0547/3016/a95e6.png)
In this problem, we have that:
So the correct answer is:
C. 115 / square of 100 = 11.5
Ответ:
5y-2y= 3y+y= 4y divided bye 3