In Car Repair
How to Jump Start a Car
If your battery has died, you may be able to use jumper cables to jump start it from some good Samaritan’s vehicle. If you can safely use jumper cables on your vehicle, make sure that the b...
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In Car Repair
If your battery has died, you may be able to use jumper cables to jump start it from some good Samaritan’s vehicle. If you can safely use jumper cables on your vehicle, make sure that the b...
In Catholicism
According to Exodus in the Old Testament, God issued his own set of laws (the Ten Commandments) to Moses on Mount Sinai. In Catholicism, the Ten Commandments are considered divine law because God himself revealed them. And be...
In Catholicism
Rosary beads help Catholics count their prayers. More importantly, Catholics pray the rosary as a means of entreaty to ask God for a special favor, such as helping a loved one recover from an ill...
What is the Amazon Fire TV Stick? The Amazon Fire TV Stick is a new device joining the ranks of home entertainment streaming technologies. The Fire Stick plugs into your TV’s HDMI port giving y...
In Basic Math
Calculating percentages can be an easy task. There are numerous percentage calculators online that can help with task by simply searching for “percentage calculator.” However, there may be a time when (however, unlikely i...
In Statistics
When you test a hypothesis about a population, you can use your test statistic to decide whether to reject the null hypothesis, H0. You make this decision by coming up with a number, called a p-v...
Want to read a foreign language website in your native language? Google Translate can help you with that. And it’s not just single web pages, either. You can browse an entire website in the...
In Gin Rummy
Rummy is a card game in which you try to improve the hand that you’re originally dealt. You can do this whenever it’s your turn to play, either by drawing cards from a pile (or stock) or by p...
In Clogs
Even if you are careful about what you put down your garbage disposal, clogs happen. There are some simple things you can do to keep clogs to a minimum and steps you can take when that inevitable...
In Statistics
In statistics, the correlation coefficient r measures the strength and direction of a linear relationship between two variables on a scatterplot. The value of r is always between +1 and –1. To...
In Statistics
When you perform a hypothesis test in statistics, a p-value helps you determine the significance of your results. Hypothesis tests are used to test the validity of a claim that is made about a population. This claim that’s...
In Networking
One of the best ways to get started with cloud computing is to use a cloud-based e-mail service such as Google’s Gmail instead of server-based Microsoft Exchange. However, you may not be re...
In Excel
In many cases, you will base the formatting rule for your Excel cells on how they compare to the value of another cell. Take the example illustrated here. The cells are conditionally highlighted...
In Statistics
If you know the standard deviation for a population, then you can calculate a confidence interval (CI) for the mean, or average, of that population. When a statistical characteristic that’s being measured (such as income, I...
In Geometry
The three special parallelograms — rhombus, rectangle, and square — are so-called because they’re special cases of the parallelogram. (In addition, the square is a special case or type of b...
In R
One set of arithmetic functions in R consists of functions in which the outcome is dependent on more than one value in the vector. Summing a vector wi...
In R
R contains a set of functions that allow you to test for the type of a vector. All these functions have the same syntax: is, a dot, and then the name...
In R
R is many things: a programming language, a statistical processing environment, a way to solve problems, and a collection of helpful tools to make you...
In R
Vectorized functions are a very useful feature of R, but programmers who are used to other languages often have trouble with this concept at first. A...
In R
In R, of course, you want to use more than just basic operators. R comes with a whole set of mathematical functions. R naturally contains a whole set...
In R
By default, R keeps track of all the commands you use in a session. This tracking can come in handy if you need to reuse a command you used earlier or...
In R
To create a vector from a simple sequence of integers, for example, you use the colon operator (:) in R. The code 3:7 gives you a vector with the numb...
In R
A vector is the simplest type of data structure in R. The R manual defines a vector as “a single entity consisting of a collection of things....
In R
If you have experience in programming, you’ve probably heard of camel case, before. It’s a way of giving longer names to objects and funct...
In R
In R, you can combine a vector with itself if you want to repeat it, but if you want to repeat the values in a vector many times, using the c() functi...