The Z-Score is negative when the data point is below the mean and positive when it's above the mean a Z-Score of 0 means it's equal to the mean. Calculating the Z-Score: The Z-Score represents a data point's relation to the mean measurement of the data set.Security Features: Two-factor authentication, which requires you to type in a code sent to your mobile device after entering your password, helps guard against hacking.

This increases your privacy by ensuring the camera is off when you are home. Privacy Features: A geofencing feature can turn a camera off when your smartphone is in the house and back on when you leave.Design: Make sure that the camera goes well with your decor or the outside of your house, but also that it's noticeable to burglars.Field of View: A home security camera system should have a field of view between 130 and 180 degrees.Storage: Most cameras store their footage in the cloud for remote viewing, although some can store it on a micro SD card in the camera or on a separate hard drive that’s connected with a cable.Those with at least one microphone give you two-way talk capabilities.

Audio: Many cameras allow you to see and hear what's going on using a speaker.

Night Vision: For good outdoor security, an outdoor security camera should be able to see at least 50 feet in the dark using infrared technology.

Super HD (4 megapixels or 2K) and ultra HD (8 megapixels or 4K) are better for zooming in to see details.

Video Quality: Resolution is important for seeing key details, so look for at least full high-definition (HD) video (1080p or 2 megapixels).

Smartphone Alerts: Customizable alerts can be sent to your smartphone or tablet when something happens on-camera.

Motion Activation: This feature allows the camera to start recording when it detects motion.

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