INPUT ARTICLE: Article: This is the yellow box with a white ghost icon on your Home screen, or in a folder on your home screen. If you have not already installed Snapchat and created your account, please do so before continuing. Snapchat always opens up to the camera screen, and swiping right will take you to your Chat page, where you can view the snaps you received. This will open the snap, and you will have 1 to 10 seconds to view it. You can only view every snap once, and you get one replay every day. You won't be able to view or screenshot a snap that you've already opened and closed before, unless you replay the snap immediately after it expires. Hold down the Sleep/Wake and Home buttons at the same time and release them. You will hear a camera shutter sound and see your screen flash, indicating you just took a screenshot. Your screenshot of the snap will save to your Camera Roll.

SUMMARY: Open Snapchat. Swipe right. Tap on the snap you want to save. Take a screenshot before the snap expires.

In one sentence, describe what the following article is about: Most songs in Western music are built around a set of common chord progressions, built on the diatonic scale. Once you know which progressions are most common in the music you listen to, you’ll have a much easier time identifying them in songs you want to learn.  Diatonic chords are numbered with Roman numerals according to the position of the root note on the scale. For example, the I chord on the C major scale is the C tonic chord (C-E-G), consisting of the 1st, 3rd, and 5th notes of the C major scale. Minor chords are written with lower case Roman numerals (e.g., i, ii, iv, etc.). One of the most common chord progressions in Western popular music is I-IV-V-I. Try playing common chords and really paying attention to what they sound like. Don’t just stick to root positions (where the notes played are the 1st, 3rd, and 5th notes, or scale degrees, of the key)—practice listening to inversions, too (such as 3rd, 5th, 8th). Listen to 7th, diminished, and augmented chords as well as basic major and minor triads. The more you listen to the chords, the more familiar they will become.  For example, in C Major, the root notes are C, E, and G, while E, G, and C, are the 3rd, 5th, and 8th scale degrees, respectively, of the first inversion of C. Try quizzing yourself with a chord identification tool like this one: https://tonedear.com/ear-training/chord-identification Songs written in major keys tend to sound bright, upbeat, happy, or hopeful, while minor keys lend a gloomy, sad, or scary sound. The easiest way to determine whether a song is major or minor is simply to listen to the overall “mood” of the piece. While the chords in a minor key song will primarily be minor chords, there will likely be some major chords mixed in. The reverse is also true of major key songs. Once you’ve figured out the tonic chord, you will have a good foundation for figuring out the rest of the song. Most songs end on the tonic (I) chord, and many also begin there. The tonic chord should be the predominant chord throughout the song, and hearing it will give you a sense of completion or satisfaction. For example, “Twinkle Twinkle Little Star,” when played in the key of C major, begins and ends on a C major tonic chord. In most songs, the bass line is the harmonic accompaniment to the melody. The bass line tends to be built on the root notes of each chord in the song. This means that if you can figure out the notes of the bass “melody,” you can pinpoint the root of each chord and build from there.  For example, if you are listening to “Twinkle Twinkle Little Star” in C major, you may identify the notes C, F, C, F, C, G, C in the bass line of the first 4 measures. These are the root notes of the chords for those measures. Once you’ve figured out the root notes, ask yourself about the quality of each chord. Does it sound major or minor? Do you hear tones other than the 1st, 3rd, and 5th notes of the chord (e.g., the 7th)? After you’ve figured out the chords, play them in order, following the rhythm of the piece. You may find it helpful to play along with a recording of the song to make sure that you have the timing right. Depending on the type of instrument you’re playing, this could mean playing the different parts together or playing the chords as accompaniment to a voice or a second instrument. Run through the song several times to make sure that your chord changes are timed correctly with the melody. For example, if you are playing the piano, you will probably play the chords primarily with your left hand while your right hand carries the melody.
Summary: Familiarize yourself with common chord progressions in your genre. Practice identifying chords by sound. Determine whether the song is in a major or minor key. Identify the tonic (I) chord. Use the bass line as a guide to find other chords. Practice playing the chords in sequence. Put the chords and melody together.

If you wear contacts, switch to eyeglasses instead until your symptoms go away. The additional contact with the infected eye(s) can increase both your discomfort and your likelihood of spreading the infection. You can soothe some of the discomfort associated with an infection by applying cool compresses to your closed eyes. Seal some ice in a clean plastic baggie. Wrap with tinfoil to slow the melting of the ice, and then wrap the entire thing with a towel or paper towel to make it more comfortable against your eyelid. Place the compress against your eye for five minutes.  Use a different compress on each eye to avoid spreading the infection, and use a new compress each time.  Warm compresses are not recommended. Though they may relieve some discomfort, the warmer environment can create an even better breeding ground for bacterial conjunctivitis. Artificial drops can help ease symptoms by reducing the gritty sensation in your eye(s). Speak to your eye care professional about using lubricating drops in conjunction with prescription eye drops. You can also put the artificial tears in the fridge to cool them. when dropped into the eye, this will soothe the eye even more
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One-sentence summary -- Avoid contacts. Apply a sterile, cool compress to the eye(s). Use over-the-counter eyedrops.

INPUT ARTICLE: Article: To find the standard error, first you must determine the standard deviation (because the standard deviation, s, is part of the standard error formula). Start by finding the average of your sample values. Sample mean is expressed as the arithmetic mean of measurements x1, x2, . . . xn. It is calculated with a formula that is shown above. For example, say you need to calculate the standard error of a sample mean for the weight measurements of five coins, as listed in the table below:You would calculate the sample mean by plugging the weight values into the formula, like this: Once you have the sample mean, you can expand your table by subtracting it from each individual measurement, then squaring the result. In the example above, your expanded table would look like this: The total deviation is the average of these squared differences from the sample mean. Add your new values together to determine it. In the example above, you would calculate as follows:This equation gives you the total quadratic deviation of measurements from the sample mean. Note that the sign of the differences is not important. Once you know the total deviation, you can find the average deviation by dividing by n -1. Note that n is equal to the number of measurements. In the example above, you have five measurements, so n – 1 would equal 4. You would calculate as follows: You now have all the necessary values to use the formula for standard deviation, s. In the example above, you would calculate standard deviation as follows:Your standard deviation is therefore 0.0071624.

SUMMARY:
Calculate the sample mean. Subtract the sample mean from each measurement and square the value. Find the total deviation of your measurements from the sample mean. Calculate the average quadratic deviation of your measurements from the sample mean. Find the standard deviation.