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# Two Tailed Distribution

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Regression analysis

##### Solution Summary

The solution addresses a two tailed distribution, f-statistic and mean square within groups.

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P3. 1. a) Ho: U=5 vs H1: U&#8800;5
<br>b) since we are to test whether it's "different from" 5 sec. This is a two-tailed distribution. And on either end of the t-distribution, a=0.025 are the rejection region.
<br>C) please refer to the attached Excel file for calculation steps:
<br>now we have: Xm=4.5, U=5, S=4.119 df=n-1=13
<br>Then t^=(Xm-U)/(S/SQRT(N))= (4.5-5)/(4.119/SQRT(13))= -0.438
<br>d) from (c) we get |t^|=0.438
<br>while from t-table, t*(0.975,13)=2.160
<br>since |t^|<t*, we can accept the H0 with 95% level of confidence.
<br>e) the above decision means that the average washing time is not different from 5 seconds for level of significance of 0.05.
<br>
<br>P4. ANOVA
<br>1) The null hypothesis will be that all population means are equal, the alternative hypothesis is that at least one mean is ...

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.