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Hypothesis - definition of hypothesis by The Free Dictionary

In this example it would be sufficient to test all participants at the same time of day and thus eliminate any difference in time of day.


Directional hypotheses
A directional prediction of what is expected to happen.

It must include the DV and be operationalised.
Nondirectional hypotheses
A nondirectional prediction of what is expected to happen.

The measured room response isnot necessarily any smoother than that for an omni-directional source.

Hypothesis | Definition of Hypothesis by Merriam-Webster

In general, the low frequency response of omni-directionalspeakers in small rooms is quite non-uniform.

The monopole radiates uniformly into all directions, whereas thedipole is directional with distinct nulls in the plane vertical to its axis ofoscillation.

Large radiating area means that the panel becomes multi-directional withincreasing frequency which contributes to critical room placement and listeningposition.

Null and Alternative Hypothesis | Real Statistics Using …

The American Heritage Dictionary defines a as, "a tentative explanation for an observation, phenomenon, or scientific problem that can be tested by further investigation." This means a hypothesis is the stepping stone to a soon-to-be proven theory. For a hypothesis to be considered a scientific hypothesis, it must be proven through the scientific method. Like anything else in life, there are many paths to take to get to the same ending. Let's take a look at the different types of hypotheses that can be employed when seeking to prove a new theory.

Because of its directionality, the dipole excites far fewerroom resonances than an omni-directional source.

In reality the speakers are not very directional and toomuch sound is radiated towards useless spaces, only to bounce around and raisethe reverberant sound level.

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Statistical hypothesis testing - Wikipedia


Descriptive and Inferential Statistics - B W Griffin


This dog wearables project aims to solve these problems. As seen in the diagram, the idea is to have a dog wear a collar box. The collar box contains a GPS module, tilt switch, and a RFM69 transceiver.

Dog Escape Alarm and Tracking
The GPS location is constantly being sent from the dog unit to the OpenHAB Raspberry Pi at home, via the same gateway previously detailed. The moment the GPS signal strays beyond a virtual boundary defined in OpenHAB, the Raspberry Pi speakers play an audible alarm to alert the dog owner they need to go out and fetch the dog. The owner can look at the OpenHAB screen to see a google map of where their dog currently is (or at least the last GPS signal received). Armed with the initial direction the dog went, he can then use a handheld unit to locate the dog outside. With the great range of the RFM69, the system should be able to locate the dog more than 900 feet away with the hand-held unit, or 700 feet with building obstruction. The range is good enough to be very helpful when locating a lost dog, even if you have no clue where it might have gone. You can drive around waiting for a ping from the handheld unit.

Room Acoustics - Linkwitz Lab - Loudspeaker Design

I don't actually talk to my field nodes - the field node to base communication is single-direction only. All of my sensor demos can be done with uni-directional wireless comms, but admittedly bi-directional communications would be more efficient for the security sensors. There's no technical reason why the RFM gateway can't talk to the RFM nodes...other than it requires a more thoughtful approach to the communication scheme...you know, the actual difficult part.

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