Question
$2.00 psy 315 week 3 dq number 1 and 2
- From Psychology: General-Psychology
- Due on Jul. 30, 2112
- Asked on Jul. 27, 2012 at 03:41:14AM
Q:
week 3 dq number 2
2.What is the difference between a one-tailed and a two-tailed test of significance? Under what circumstances would each be used? Please provide examples.
1.Why is it said that hypothesis testing involves double negative logic?
$2.00
perfect answer A++
- This tutorial was purchased 1 time and rated No Rating by students like you.
- Posted on Jul. 27, 2012 at 03:45:33AM
A:
Preview: ... for the possibility of the relationship in both directions. For example, we may wish to compare the mean of a sample to a given value x using a t-test. Our null hypothesis is that the mean is equal to x . A two-tailed test will test both if the mean is significantly greater than x and if the mean significantly less than x . The mean is considered significantly different from x if the test statistic is in the top 2.5% or bottom 2.5% of its probability distribution, resulting in a p-value less than 0.05.
Next, let's discuss the meaning of a one-tailed test. If you are using a significance level of .05, a one-tailed test allots all of your alpha to testing the statistical significance in the one direction of interest. This means that .05 is in one tail of the distribution of your test statistic. W ...
The full tutorial is about 1144 words long .
$10.00
Response to discussion questions
- This tutorial was purchased 1 time and rated No Rating by students like you.
- Posted on Jul 28, 2012 at 1:40:48PM
Posted by :
A:
Preview: ... of a two tailed test of significance is to check whether the mean is greater than y or less than y. If the test statistic is in the top 2.5% or bottom 2.5% of the probability distribution, then the mean is considered to be different from y resulting in p value less than 0.05.
In case of one tailed test of signi ...
The full tutorial is about 277 words long plus attachments.
$10(mathgeek2011)(raheel).docx (11K)