• ### How do I know whether to use a 1-tailed or 2-tailed statistic?

College student here, my professor has failed to tell us when it is appropriate to use a one-tailed statistic, Z(α); as opposed o a two-tailed statistic +/-Z(α/2). Same story with t-distribution. Help me out please.
College student here, my professor has failed to tell us when it is appropriate to use a one-tailed statistic, Z(α); as opposed o a two-tailed statistic +/-Z(α/2). Same story with t-distribution. Help me out please.
3 answers · Mathematics · 9 years ago
• ### Why does the factorial of zero equal one?

Okay, so I know that the factorial of zero is equal to 1 (0! = 1). But why is this so? Can someone with a degree in math explain this for me? Information doesn't really click with me unless I understand why it works that way. Thanks.
Okay, so I know that the factorial of zero is equal to 1 (0! = 1). But why is this so? Can someone with a degree in math explain this for me? Information doesn't really click with me unless I understand why it works that way. Thanks.
4 answers · Mathematics · 9 years ago
• ### Question about rounding numbers?

I am a college student, who has been told, consistently, the same rules of rounding decimals since I was in third grade. 17.52 is 18, and 17.49 is 17. Today, my chemistry professor threatened to turn this very basic rule upside down for reasons I cannot comprehend. His edition of the rules are as follows: In the instance that 5 is the first... show more
I am a college student, who has been told, consistently, the same rules of rounding decimals since I was in third grade. 17.52 is 18, and 17.49 is 17. Today, my chemistry professor threatened to turn this very basic rule upside down for reasons I cannot comprehend. His edition of the rules are as follows: In the instance that 5 is the first non-significant figure in a number, he says to look to the next non-significant figure. No problem. At which point he says the following thing: If 5 is not followed by anything, round up If 5 is followed by an odd number, round up If 5 is followed by an even number or zero, round down. For example, if we were to round the following numbers to the third significant figure: 17.150 rounds down to 17.1 17.151 rounds up to 17.2 17.152 rounds down to 17.1 And so on. Does this make a damn bit of sense to anyone, especially the Chemistry and Math authorities out there? I need to know. If this is correct, and I have been told wrongly the rules of rounding up until this day, I would like to know. An explanation would be helpful too, as to why this rule is true. Thank you very much.
3 answers · Mathematics · 9 years ago
• ### What do you recommend for HDR rendering software?

I've been doing photography for a while, but I've just recently discovered the wonders of high dynamic range imaging. I'm thinking about getting Photomatix. Are there any better HDR rendering programs out there, and if so, what are they? Thanks.
I've been doing photography for a while, but I've just recently discovered the wonders of high dynamic range imaging. I'm thinking about getting Photomatix. Are there any better HDR rendering programs out there, and if so, what are they? Thanks.
1 answer · Software · 9 years ago
• ### Xbox 360 controller broken, suggestions?

A couple of my idiot friends came over one day, jammed the power/xbox live button on one of my controllers, and left without a word. It's pressed in and won't come out. Any suggestions on how to fix it? I sure would hate to have to replace a \$50 controller :(
A couple of my idiot friends came over one day, jammed the power/xbox live button on one of my controllers, and left without a word. It's pressed in and won't come out. Any suggestions on how to fix it? I sure would hate to have to replace a \$50 controller :(
2 answers · Xbox · 10 years ago
• ### C++ coding language. Help? (Beginner)?

I'm not, in any sense of the word, fluent in C++ and thus I need an answer to a beginners questions: I wrote a C++ program which looks exactly like this: #include <iostream> using namespace std; int main() { cout << "This is C++" << endl; return 0; } The code above is called "Print". Basic... show more
I'm not, in any sense of the word, fluent in C++ and thus I need an answer to a beginners questions: I wrote a C++ program which looks exactly like this: #include <iostream> using namespace std; int main() { cout << "This is C++" << endl; return 0; } The code above is called "Print". Basic right? The code is flawless, from what I can tell. But the book I am working with wants me to write another code (that I called "print1") with: Int main() { again. However when I use: Int main() { again in another project (such as "Print1") - it gives me this error: 1>Compiling... 1>Print.cpp 1>print1.cpp 1>Generating Code... 1>Linking... 1>Print1.obj : error LNK2005: _main already defined in Print.obj 1>C:\Users\Aaron\Documents\Visual Studio 2008\Projects\Chapter1\Debug\Chapter1.ex... : fatal error LNK1169: one or more multiply defined symbols found 1>Build log was saved at "file://c:\Users\Aaron\Documents\Visual Studio 2008\Projects\Chapter1\Chapter1\Debug\Bu... 1>Chapter1 - 2 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== I understand that my error is exactly that: "main" is defined in more that one code. It was defined in both "Print" and Print1" NOW MY QUESTIONS ARE: Why cant I use main in more than one code/project? How do I write multiple codes that can all work, but use the same code, and run so I may look back at my previous work? ----------------------------------------... It would be absurd to think that you can only create one code at a time, and I would have to delete my previous codes before moving onto my next code in my book.
3 answers · Programming & Design · 10 years ago
• ### Are there wheel bearings on a 1997 ford escort? If so, where are they?

I'm hearing contrasting points of view from different mechanics. Please help.
I'm hearing contrasting points of view from different mechanics. Please help.
3 answers · Ford · 10 years ago
• ### Help with Diablo 2 terminology.?

What does it mean when someone uses the term 40s? Take for example a 40s Monarch. I've been out of the loop since v1.07 and I could really use the help. Thanks.
What does it mean when someone uses the term 40s? Take for example a 40s Monarch. I've been out of the loop since v1.07 and I could really use the help. Thanks.
1 answer · Video & Online Games · 10 years ago
• ### How do I get rid of my holiday weight-gain?

Okay, I'm in college and generally I'm quite in shape. Everything was fantastic for me, 6-pack abs, etc, until my one-month holiday break came along, and I basically got lazy and started eating a lot of sweets. I obviously gained some weight, and I now have a layer of fat on my belly that has been inconveniencing me for quite a while... show more
Okay, I'm in college and generally I'm quite in shape. Everything was fantastic for me, 6-pack abs, etc, until my one-month holiday break came along, and I basically got lazy and started eating a lot of sweets. I obviously gained some weight, and I now have a layer of fat on my belly that has been inconveniencing me for quite a while now. I hear contrasting points of view on the best way to get rid of it. On one hand everyone tells me to do hardcore sit-ups and crunches to spot reduce it, but on the other hand I hear that cardiovascular activity burns calories more quickly than crunches and sit-ups. Does anybody have any suggestions for me? They'd be much appreciated.
4 answers · Diet & Fitness · 1 decade ago
• ### How do I clean the keyboard on a macbook pro?

A few days ago, a friend of mine spilled mango juice on my keyboard, which didn't damage the computer, thank god. However, the eject and volume keys (where most of the juice landed) are extremely sticky and hard to push. Does anyone have any suggestions or ways for me to clean the gunk out of my keyboard without dismantling the computer completely?
A few days ago, a friend of mine spilled mango juice on my keyboard, which didn't damage the computer, thank god. However, the eject and volume keys (where most of the juice landed) are extremely sticky and hard to push. Does anyone have any suggestions or ways for me to clean the gunk out of my keyboard without dismantling the computer completely?
6 answers · Laptops & Notebooks · 1 decade ago
• ### I have just downloaded Diablo 2 from the Blizzard site. But it won't open. Help?

I have the CD keys for Diablo and the LOD, and with them I downloaded the games from the Blizzard site for my Mac. Now when I try to launch Diablo II (Carbon) it unexpectedly quits every time. Does anybody know what I can do?
I have the CD keys for Diablo and the LOD, and with them I downloaded the games from the Blizzard site for my Mac. Now when I try to launch Diablo II (Carbon) it unexpectedly quits every time. Does anybody know what I can do?
2 answers · Video & Online Games · 1 decade ago
• ### Selective service?

I have recently come of age (18 years old) and I am now obligated to register for selective service. I'm already a registered conscientous objector. What I need to know is: at the time I register for selective service are there any extra steps I need to take to be acknowledged as a conscientous objector by the United States federal government?
I have recently come of age (18 years old) and I am now obligated to register for selective service. I'm already a registered conscientous objector. What I need to know is: at the time I register for selective service are there any extra steps I need to take to be acknowledged as a conscientous objector by the United States federal government?
4 answers · Law & Ethics · 1 decade ago
• ### Physics buffs, I need to know something about work and energy.?

How much force is required to move a mass of 3.8e-4 kilograms a distance of 2.0e-2 meters through a frictionless environment? The equation to solve this would be helpful as well.
How much force is required to move a mass of 3.8e-4 kilograms a distance of 2.0e-2 meters through a frictionless environment? The equation to solve this would be helpful as well.
1 answer · Physics · 1 decade ago
• ### Does anyone have suggestions for music?

I just recently discovered pop-punk music, the only band of which I know is All Time Low. Can anyone give me suggestions for other good pop-punk bands out there. Thanks.
I just recently discovered pop-punk music, the only band of which I know is All Time Low. Can anyone give me suggestions for other good pop-punk bands out there. Thanks.
10 answers · Rock and Pop · 1 decade ago
• ### Is my tattoo turning out right?

I got my tattoo five days ago. A nautical star on my left hip. It scabbed two days later, but now the scab is already fallling off. Is that bad?
I got my tattoo five days ago. A nautical star on my left hip. It scabbed two days later, but now the scab is already fallling off. Is that bad?
8 answers · Tattoos · 1 decade ago