How to read histograms 
Recognize the difference between a bar chart and a histogram. 
Bar charts and histograms are similar, but with some very specific differences. A bar chart groups numbers into categories, while histograms group numbers into ranges.

Histograms are generally used to show the results of a continuous data set such as height, weight, time, etc. A bar graph has spaces between the bars, while a histogram does not.

How to get rid of sinus congestion 
Use steam. 
Fill a one-quart pot with water. Boil the water on the stove for a minute or two or until it is steaming vigorously.

Then remove the pot from the heat and place on a heat resistant mat on a table. Drape a large, clean cotton towel over your head and then place your head over the steaming pot.

Man is scuba diving under water and saying hi to the camera. People are scuba diving watching the fishes are swimming between rocks. people

are under the sea scuba diving recording everything.

How to fix the sound on a mac computer 
Restart the computer. 
Sometimes a simple reboot will fix the audio issues you are experiencing. This should always be the first thing you try when something goes wrong.


Plug headphones in and then remove them. If your volume controls are grayed out or you see a red light from your headphone jack, insert and remove an apple headphone plug a few times.