Some defenition

231 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
231
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
1
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Some defenition

  1. 1. The p - value is simply the probability of getting a value as extreme ormore extreme than the actual value of the observed statistic when thenull hypothesis is true.Confidence interval for a mean:The range with in which the populationmean is likely to lieThe variance: the sum of the squared deviation of the values from themean divided by sample size minus one.Coefficient of Variation: When two distributions have means ofdifferent magnitude, a comparison of the C.V. is therefore much moremeaningful than a comparison of their respective s.d.Standard Error of the Sample mean ( S.E. ): The sample mean isunlikely to be exactly equal to the population mean. The standard error measures the variabilityof the mean of the sample as an estimate ofthe true value of the mean for the populationfrom which the sample was drown.

×