Answer:
C. Mean
Explanation:
Mean = (∑
)/N
Median = central values when data is sorted
Mode = most repeated value
Standard deviation = 
In standard deviation, formula you may see that deviation is being calculated from the mean (central location). But here we take square of the value before adding all of them.
But if we just take 
, it would be equal to zero.
<u>EXAMPLE</u>
Take 4, 9, 5 as data
mean = (4+9+5)/3 = 18/3 = 6
sum of deviations from mean = (4-6)+(9-6)+(5-6) = (-2)+(3)+(-1) = 0
Answer:
Following is the expression written in "Bash script" (mixture of commands):
^\d{5}(?:[-\s]\d{4})?$
Explanation:
- ^ = For staring string (denotation).
- \d{5} = Matching 5 digits (first five unknown x's)
- (?:…) = Making Group (making group of former 5 digits)
- [-\s] = Match a hyphen or a space
(checking if a hyphen is present?)
- \d{4} = Matching 4 digits (next four unknown x's)
- …? = Pattern before it is optional
- $ = Ending of the string.(denotation)
Database management systems are used to store and to access information.
In <span>the Relational Database Management System </span>(RDBMS), all the data is in the form of simple columns and rows in a table. Structured Query Language (SQL) is is the standard query language for RDBMS. Some of the disadvantages of RDBMS are: not enough storage area to handle data such as images, digital and audio/video, do not provide good support for nested structures,not much efficient and effective integrated support.
<span>The
term object oriented database management systems (OODBMS) refers to a wide variety of different database technologies
that were developed in order to overcome some of the limitations of
relational databases.</span>
LAN is local area network and WAN is wide are networks, so it’s the distance they span
