How do you open a 3 digit combination without knowing the code?
You should try out all of the three-digit combination.
There are 10x10x10 = 1,000 possible combination (assuming digits 0-10).
What is the most dangerous city in the world?
If you want to be realistic, Detroit. If not, most likely to be danger city
How do you generate random numbers in PHP?
Use the function "rand()" or "mt_rand()". Both functions will generate a random number (as a return value, so be sure to make it point to a variable - see examples). However, "rand()" is slower and uses a default PHP randomizing system. mt_rand() is four times as fast, and uses the Mersenne Twister randomizing format - which is much more random. Both functions have two optional parameters - a minimum integer and a maximum integer, respectively. By filling in these parameters, you will get a random number between the values you give (so, giving one and five will give you a random number that is no less than one, and no greater than five). These, again, are optional - and if left blank, the tiniest integer possible is no less than 0, and the largest integer possible is generated by the PHP function "getrandmax()" / "mt_getrandmax()" automatically. Examples, of which all are acceptable: ---- /* Examples using no parameters */ $randomNumber = rand(); $randomNumber = mt_rand();
/* Examples using parameters */ $randomNumber = rand(1, 5); $randomNumber = mt_rand(6, 10); ---- If your PHP build is version 4.2 or under, you will need to seed the random number generator with a value to base off of. "srand()" and "mt_srand()" (to be used with rand() and mt_rand() functions, respectively) can be used in this case. They both only have one optional parameter, which is any seed value - any number. If omitted, a random seed will be generated. More acceptable examples: ---- // Example using no parameters
srand();
$randomNumber = rand(); // Example using the seed parameter
srand(12345);
$randomNumber = rand(); // Example using the "mt" random format functions (without parameters)
mt_Rand();
$randomNumber = mt_rand(); // Example using the "mt" random format (with parameters)
mt_rand(12345);
$randomNumber = mt_rand(); ----
How is the expected outcome determined in a discrete distribution?
If X is a discrete variable then
E(X) is the sum of x*Prob(X = x) where the summation is over all possible values of x.
The term is actually "sheepishly." It refers to someone who is embarrassed or demure because they lack self assurance.
You toss the same coin five times how would you classify the events?
The answer depends on what you are looking for: the full sequence of results, the number of heads (or tails) the number of runs, the lengths of runs, or whatever.
What is the standardizing variables?
There doesn't exist such a thing.
What does exist are standardized variables, which are variables with mean = 0 and standard deviation = 1
-- If 'zero' is always the first digit, then we're pretty darn sure that no other digit
can be repeated in the same 2-digit number, since there's only one digit left to
be filled in.
-- If 'zero' is always the first digit, then there are exactly six possible 2-digit numbers:
00
01
02
03
04
and
05.
What are the forms of surveys?
I'm guessing you mean what are the types of surveys in general.
If so, then I can think of 4 types of surveys off the top of my head.
There are also 3 types of surveys based on the frequency of deployment.
Cross-sectional studies - These type of surveys offers a researcher a quick summary of what respondents think at that given time. These surveys are short and ready to answer and can measure opinion in one particular situation.
Longitudinal surveys - Longitudinal surveys are those surveys that help researchers to make an observation and collect data over an extended period.
Retrospective survey - A retrospective survey is a type of study in which respondents answer questions to report on events from the past. By deploying this kind of survey, researchers can gather data based on past experiences and beliefs of people.
I can tell you about this one Online Paid Survey site in particular, it’s called Zippy Opinion.
The survey invitations from this panel are super easy to complete and the time taken to complete a survey will not exceed 20 minutes.
This website pays more points for surveys and provides far more survey invitations to their panel members when compared to its counterparts.
This site runs loads of innovation contests on all its social channels and community pages wherein members can earn rewards worth USD $680(INR 5000) approx.
This awesome site also creates opportunities for the following:
The Minimum Threshold to redeem points is 500 Points equivalent to UDS $6.
Panel members can redeem their points as Online gift vouchers
Just sign up to them and that's it.
Try them out! Stay safe out there!
How many 4 digit combinations can be made using 0 through 9 and using each number only once?
There are 900 possible combinations, starting with 1005....
================================
If the digits can't repeat . . .
The first can be 1, 2, 3, 4, 6, 7, 8, or 9 . . . 8 choices. For each one . . .
The second can't be 5 or the one used . . . 8 choices. For each one . . .
The third can't be 5 or the two used . . . . . 7 choices. For each one . . .
The fourth one is 5.
Total number of possibilities = (8 x 8 x 7 x 1) = 448.
If the digits can repeat:
The first can be any one of 9 choices (all except zero). For each one . . .
The second can be any of 10 choices. For each one . . .
The third can be any one of 10 choices. For each one . . .
The fourth is 5.
Total number of possibilities = (9 x 10 x 10 x 1) = 900.
What is the minimum required sample size for running logistic regression?
In fitting a logistic regression, as in applying any statistic method, the required sample size depends on the level of dispersion in the population and the quality of the statistics that you are prepared to accept.
Usually there will be some information available somewhere (in the literature, say, or from colleagues) suggesting what level of variability to expect in data that is collected. This can be used to simulate some data sets and the logistic regression results that would arise from them. By varying the sizes of the data sets you can make a judgement. Once you have collected your first sample and fit the actual logistic regression to it you will have a much better idea how much data is actually required for useful estimates.
How many combinations of 6 numbers from 7?
7 of them. Remember, that in a combination the order of the numbers does not matter.
Is a unique mode the same thing as a mode?
No. Some distributions and some sets of observations can have more than one modes. In such cases there is no unique mode.