Why are post hoc test preferred over several t-test

1 answer:

4 0

Almost all the post-hoc paired comparisons are variations on t test, but basically the difference between post hoc paired comparisons from t test is the way that the standar error is estimated. On t test the standard error between two groups is easily calculated, but what happen when you have three or more groups? Then you must to perform an ANOVA test, and this gives you the answer to the standard error: the mean square of error (within groups) can be used to estimate this, and all post-hoc procedures uses this value in its calculus.

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Rule add 15, subtract 10 first term4

mr Goodwill [35]

I think that would be 9 I am not sure.

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3 years ago

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vazorg [7]

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3 years ago

The minute hand of a clock is 8 inches long. To the nearest tenth of an inch, how far does the tip of the minute hand travel as

lesya692 [45]

Answer:

The tip of the minute hand travels 20.9 inches.

Step-by-step explanation:

We are given that the minute hand of a clock is 8 inches long. And we have to find that how far does the tip of the minute hand travel as the time progresses from 12:00 to 12:25.

<u>So, firstly we will find the circumference of circle;</u>

Circumference of circle (C) = $2\pi r$ {where r is radius of circle}

= $2 \times \pi \times 8$ {given r = 8 inches long}

= $16 \pi$

Now, as we know that the minute hands completes the full circle in 60 minutes, therefore, the length of the arc between time 12:00 to 12:25 represents $\frac{25}{60}$ which is $\frac{5 }{12}$ of the circumference, that means;