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	Null hypothesis - Wikipedia, the free encyclopedia
		When used, the null hypothesis is presumed true until statistical evidence in the form of a hypothesis test indicates otherwise.
		For example, if the null hypothesis is that sample A is drawn from a population with the same mean as sample B, the alternative hypothesis is that they come from populations with different means, which can be tested with a two-tailed test of significance.
		The formulation, testing, and rejection of null hypotheses is methodologically consistent with the falsificationist model of scientific discovery formulated by Karl Popper and widely believed to apply to most kinds of empirical research.
	www.wikipedia.org /wiki/Null_hypothesis (873 words)

	Null
		In computer programming, null is a special value for a pointer (or reference) that is used to signify that the pointer's target is not a valid data element.
		In radio electronics, a null is an area or vector at which the signal from two or more of the antenna elements in an antenna system cancels out almost entirely.
		Null fill in the vertical plane is used to prevent this.
	www.brainyencyclopedia.com /encyclopedia/n/nu/null.html (402 words)

	Null character - Wikipedia, the free encyclopedia
		The null character (also null terminator) is a character with the value zero, present in the ASCII and Unicode character sets, and available in nearly all mainstream programming languages.
		The main advantage of using a null character is that strings can be of any length, and only one character of additional storage is required.
		In null-terminated strings, the first occurring null character is interpreted as the end of the string.
	en.wikipedia.org /wiki/Null_character (611 words)

	Null (Site not responding. Last check: 2007-11-06)
		NULL is defined in several ANSI headers as the symbolic constant (void *)0.
		A null character is used to terminate the string.
		The null at the end can be coded by using the escape sequence '\0'.
	www.phim.unibe.ch /comp_doc/c_manual/C/SYNTAX/null.html (107 words)

	Interpreting Null Results
		Null hypothesis significance testing do not allow for conclusions about the likelihood that the null hypothesis is true, only whether it is unlikely that null is true.
		Terms used throughout this paper are null hypothesis, parameter, Type I error, Type II error, power, rejecting the null hypothesis, and failing to reject the null hypothesis.
		Null hypothesis significance tests do not provide estimates of the actual value of a parameter; only what the parameter is unlikely to be.
	www.jasnh.com /a6.htm (3175 words)

	Null - Wikipedia, the free encyclopedia
		Null, a concept in electromagnetism and theoretical physics.
		Null, in science fiction null space is sometimes a dimension or space related to subspace.
		This is a disambiguation page: a list of articles associated with the same title.
	en.wikipedia.org /wiki/Null (112 words)

	PHP: NULL - Manual
		The null type was introduced in PHP 4.
		It treats NULL as the constant and unsets the variable.
		Nulls are almost the same as unset variables and it is hard to tell the difference without creating errors from the interpreter:
	www.php.net /manual/en/language.types.null.php (872 words)

	Statistics Glossary - hypothesis testing
		This is due to the fact that the null hypothesis relates to the statement being tested, whereas the alternative hypothesis relates to the statement to be accepted if / when the null is rejected.
		If we do not reject the null hypothesis, it may still be false (a type II error) as the sample may not be big enough to identify the falseness of the null hypothesis (especially if the truth is very close to hypothesis).
		Presumably, we would want to test the null hypothesis against the first alternative hypothesis since it would be useful to know if there is likely to be less than 50 matches, on average, in a box (no one would complain if they get the correct number of matches in a box or more).
	www.stats.gla.ac.uk /steps/glossary/hypothesis_testing.html (2225 words)

	NULL - The Ultimate Computer Language [rec.humor.funny]
		NULL is the culmination of five years of work by a team of language designers and computer science mathematicians.
		A NULL compiler can be written first in NULL without ever needing to be written in a lower level language.
		NULL programmers are easy to find and once found can be fired since they are not needed.
	www.netfunny.com /rhf/jokes/new90/nullang.html (455 words)

	NULL Handling in SQLite
		NULLs are still distinct in a UNIQUE column.
		The fact that NULLs are distinct for UNIQUE columns but are indistinct for SELECT DISTINCT and UNION continues to be puzzling.
		It seems that NULLs should be either distinct everywhere or nowhere.
	www.sqlite.org /nulls.html (768 words)

	PHP: is_null - Manual (Site not responding. Last check: 2007-11-06)
		We can conclude that is_null will error on an unset variable, and thus is not the same as isset.
		Regarding the function that returns a default value if the passed value is null: I like my functions names to bear resemblance to their function (Nz doesn't really pass that test).
		Regarding avoidance of NULLs in your MySQL queries, why not use IS NULL and IS NOT NULL in your WHERE clauses.
	us3.php.net /is_null (653 words)

	A Critical Look at Gary Null's Activities and Credentials
		Null says he holds an associate degree in business administration from Mountain State College in West Virginia, a bachelor's degree from Thomas A. Edison State College in New Jersey, and a PhD in human nutrition and public health sciences from The Union Institute in Cincinnati, Ohio.
		Null's thesis states that six others who began in the first group and five others who began in the second group dropped out of the study because they were uncomfortable.
		Null noted that the theory behind the test "is still the subject of debate and has not yet gained wide scientific support"—which is a rather strange way to describe a test that is utterly worthless for any medical purpose and could never gain widespread scientific acceptance.
	www.quackwatch.org /04ConsumerEducation/null.html (2441 words)

	Null equals undefined, but null doesnt strictly equal undefined - Flash Insider
		Null is used to define a variable with no value or to define an empty set of values.
		Also null evaluated to 0 in a numeric sense Undefined if used to explain that a variable has no value before a specific value has been assigned or even before the variable has been declared.
		Null is equal to undefined in value, but not type so null is not strictly equal to undefined.
	www.flashinsider.com /2005/07/25/null-equals-undefined-but-null-doesn-t-strictly-equal-undefined (1049 words)

	CIRT @ CIS @ Brown
		The NULL session vulnerability is fairly widespread, however the introduction of Windows XP and Windows 2003 has made it far less useful.
		This is another great usage of NULL sessions, if the user has been conscientious and renamed the administrator account, we can see what it has been changed to.
		Configuring the Snort (www.snort.org) NULL session detection rule (http://www.snort.org/pub-bin/sigs.cgi?sid=530) to look at certain traffic proves to be very effective.
	www.brown.edu /Facilities/CIS/CIRT/help/netbiosnull.html (1635 words)

	NULL session access
		A NULL session connection is an unauthenticated connection to an NT/W2000 machine.
		Gaining NULL session access to an NT\W2000 system is the number one method for hackers to enumerating information about an NT\W2000 machine.
		A null session can only be made to TCP port 139, but the above other ports are often required for code to be called effectively.
	www.softheap.com /security/session-access.html (578 words)

	AskTom "Null And Not Null" (Site not responding. Last check: 2007-11-06)
		Why did we Require to Assign Null to coloumn when we can assign NOT NULL with default Value 0; What is difference.
		NULLs are optional - NULLs are used to represent "i don't know" 0 is a value NULL is the absence of a value - it is "nothing" You can chose to use 0 with NOT NULL and default the column -- if it makes sense.
		Another difference is that null is not included in an index.
	asktom.oracle.com /pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:21390168255454 (280 words)

	10.4 Null Pointers
		A function that returns pointer values can return a null pointer when it is unable to perform its task.
		In general, C does not initialize pointers to null for you, and it never tests pointers to see if they are null before using them.
		If one of the pointers in your programs points somewhere some of the time but not all of the time, an excellent convention to use is to set it to a null pointer when it doesn't point anywhere valid, and to test to see if it's a null pointer before using it.
	www.sis.pitt.edu /~ir/KS/Data/SSummit/sx10d.html (701 words)

	Null Space (Site not responding. Last check: 2007-11-06)
		Summary: This module defines the null space, shows an example of what one is, and describes how to find one given an arbitrary matrix.
		There is a great deal more to finding null spaces; enough, in fact, to warrant another module.
		One important aspect and use of null spaces is their ability to inform us about the uniqueness of solutions.
	cnx.rice.edu /content/m10293/latest (516 words)

	Forum OpenACS Development: PgBindCmd turns the empty string into NULL (Site not responding. Last check: 2007-11-06)
		It is the same problem I have in a function called obj__set_attrs, that checks if the passed in attribute is null, and if it isn't, it sets the attribute to the passed in value.
		NULL and the empty string are both passed back as empty Tcl strings in the ns_set built by the drivers (ours and the sybase one written by the AOLserver team - actually, the PG driver was originally written by them, too, though bindvar emulation was added by Dan Wickstrom and me).
		The empty string is NULL in Oracle so the suggestion to use undefined Tcl vars as a flag and the empty string as the empty string would introduce differences in behavior between the Oracle and PG version.
	openacs.org /forums/message-view?message_id=29109 (1122 words)

	INF: BCP and NULL Values
		Although spaces in the input data file may seem to intuitively represent NULL, the ASCII space (0x20) is also a legitimate character, with possible significance.
		The string "NULL" couldn't be properly written to the output file, because this would be a valid string, and upon input be loaded as the string "NULL," not the value NULL.
		The only non-ambiguous way to represent NULL in character-mode BCP is by using two adjacent delimiters in a character-delimited file.
	support.microsoft.com /default.aspx?scid=kb;EN-US;Q98620 (713 words)

	Null Session (Site not responding. Last check: 2007-11-06)
		Null sessions are un-authenticated connections (not using a username or password.) to an NT or 2000 system.
		Null session connections, or anonymous logons, can be the single most devastating network foothold sought by intruders.
		Null sessions require access to TCP 139 (and/or 445 on Win 2000).
	rusecure.rutgers.edu /add_sec_meas/nullssn.php (578 words)

	NULL in Oracle
		A way to view NULLs: NULL is defined as being not-equal to everything else, including another NULL.
		A column in a table can be defined with the not null constraint.
		The set null command in SQLPlus defines how nulls* are displayed in a resultset.
	www.adp-gmbh.ch /ora/misc/null.html (239 words)

	RS232 serial null modem cable wiring and tutorial
		The terminology null modem for the situation where two computers communicate directly is so often used nowadays, that most people don't realize anymore the origin of the phrase and that a null modem connection is an exception, not the rule.
		This means that the null modem cable allows communication as long as no flow control is needed, but when data speeds reach the limit the receivers can handle, communication may stop immediately without an assignable reason.
		The simple null modem cable and the null modem cable with loop back handshaking are useful, but have no provisions for hardware flow control.
	www.lammertbies.nl /comm/info/RS-232_null_modem.html (2185 words)

	Web services tip: Representations of null in XML Schema
		Represent a null value in the XML-equivalent of a field when you map a null Java™ bean field to XML.
		There are a number of ways to adorn XML attributes and elements so that instances of them can be null (or at least logically equivalent to null).
		Array Gotcha - Null Array vs. Empty Array -- Learn about the distinction between an array which is null and an array which has no elements.
	www-128.ibm.com /developerworks/xml/library/ws-tip-null.html (1100 words)

	Clan NULL - Homepage (Site not responding. Last check: 2007-11-06)
		Clan NULL is pleased to annouce we have opened a BF2 Division.
		Clan NULL would like to congratulate arsenal on completing all required Phases.
		Clan NULL would like to congratulate haplo on completing all required Phases.
	www.clannull.com (264 words)

	Left Null Space (Site not responding. Last check: 2007-11-06)
		If one understands the concept of a null space, the left null space is extremely easy to understand.
		The Left Null Space of a matrix is the null space of its transpose, i.e.
		The procedure is no different than that used to compute the null space of A itself.
	cnx.rice.edu /content/m10292/latest (221 words)

	Diagnosing Java Code: The Null Flag bug pattern
		As you might have guessed, I call this pattern the Null Flag bug pattern because it is caused by inconsistently using null pointers as flags for exceptional conditions.
		Despite their common occurrence, the use of null flags is very often unwarranted (as in the case above).
		The use of null flags, on the other hand, limits control flow to the ordinary paths of method invocation and return (until the whole program crashes, of course).
	www-128.ibm.com /developerworks/java/library/j-diag3.html (1305 words)

	Gary Null Complete Encyclopedia Of Editions - Direct Textbook (Site not responding. Last check: 2007-11-06)
		Gary Null - Kensington Publishing Corporation - 0758213166
		Gary Null - Kensington Publishing Corp. - 0887232361
		Null Gary - Bottom Line Books - 088723223X
	www.directtextbook.com /editions/gary-null-complete-encyclopedia-of (163 words)

	Firebird Null Guide
		In the table we don't write NULL in the expressions (as said, this is often illegal); instead, we use two entities A and B that are both NULL.
		In these recent versions, NULL strings are “trimmed” to emptystrings - which is wrong, but is considered the lesser of two evils: in the old situation, valid (empty) strings were mercilessly reduced to NULLs.
		If NULL needs special handling, like in the “right to vote” example used previously, your only option is to go for “if (MyExpression is null) then” after all.
	www.ibphoenix.com /main.nfs?a=ibphoenix&page=ibp_firebird_null (3083 words)

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