A potential problem is that you are willing to accept a <u>5% </u>chance of being wrong if you reject the null hypothesis.
The significance level is the probability of rejecting the null hypothesis if it is true. For example, a significance level of 0.05 indicates a 5% risk of concluding that there is a difference when there is actually no difference. Rejecting the true null hypothesis results in a Type I error.
The smaller the value of α the more difficult it is to reject the null hypothesis. Therefore, choosing a low value for α can reduce the likelihood of Type I errors. The result here is that if the null hypothesis is false, it may be more difficult to reject using a lower value for α. The alpha value or statistical significance threshold is arbitrary. Which value to use depends on your field of study.
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Answer:
The acceleration of the object is
Explanation:
Given:
Initial velocity of object
= 200 feet/second
Final velocity of object
= 50 feet/second
Time of travel = 5 seconds
To calculate acceleration of the object we will find the rate of change of velocity with respect to time.
So, acceleration
is given by:
![a=\frac{v_f-v_i}{t}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7Bv_f-v_i%7D%7Bt%7D)
where
represents final velocity,
represents initial velocity and
is time of travel.
Plugging in values to evaluate acceleration.
![a=\frac{50-200}{5}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7B50-200%7D%7B5%7D)
![a=\frac{-150}{5}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7B-150%7D%7B5%7D)
![a=-30\ m/s^2](https://tex.z-dn.net/?f=a%3D-30%5C%20m%2Fs%5E2)
The acceleration of the object is
(Answer). The negative sign shows the object is slowing down.
Answer:
A. usually 3 cards a year means you have little or no credit I believe
B. Reversing the current direction will cause the force deflecting the
wire to be perpendicular to the magnetic field but in the opposite
direction.