T-Test in statistics notes

1. Students t-test
Dr A K TIWARI

4. William Sealy
Gosset (13 June
1876 – 16 October
1937) was an
English statistician,
chemist and brewer
Where sample size is less
than 30

5. RAMU LALLU
12.4 14.2
12.9 12.9
13.7 13.9
15.0 16.8
14.8 11.7
12.5 13.7
14 13.4

7. t value =6.5

8. Ho
There is no sig diff
between the sample
Critical value of t
(from table)
lower
Don’t reject
H0 Reject H0
higher

9. • Degree of freedom = n1+n2-2
• 16+16-2
• = 30
• For p= 0.05
• t = 2.0523
Calculated value of t = 6.5
Which is higher than table value
HENCE NULL HYPOTHESIS IS REJECTED
There is difference between yields of two fields