When is it appropriate to use the t test?

  • Thread starter Thread starter sara_87
  • Start date Start date
  • Tags Tags
    Test
Click For Summary
The t-test is appropriate for comparing two means when the sample size is small, typically less than 30. It assumes that the underlying data distribution is normal. Additionally, the t-test is suitable when the variances of the two groups are equal or approximately equal. It is important to verify these conditions before applying the t-test to ensure valid results. Understanding these criteria helps in making informed statistical comparisons.
sara_87
Messages
748
Reaction score
0

Homework Statement



If i have data and want to compare the two means, when is it appropriate to use the t test?

The Attempt at a Solution



i know its because the distribution is normal but there are also other reasons.
Thank you.
 
Physics news on Phys.org
the t-test is used when the sample size is "small" less than 30 and the underlying distribution is normal.
 

Thread 'Distance between a Clock's hands when the distance is increasing most rapidly'

Question: A clock's minute hand has length 4 and its hour hand has length 3. What is the distance between the tips at the moment when it is increasing most rapidly?(Putnam Exam Question) Answer: Making assumption that both the hands moves at constant angular velocities, the answer is ## \sqrt{7} .## But don't you think this assumption is somewhat doubtful and wrong?
View full post »

Similar threads

Hypothesis test: Find the critical value of Z, Zc
  • · Replies 1 ·
Replies
1
Views
3K
Test of hypothesis for independent samples
  • · Replies 7 ·
Replies
7
Views
2K
Ratio Test vs AST
  • · Replies 4 ·
Replies
4
Views
1K
Understanding the Wilcoxon-signed Rank test
  • · Replies 2 ·
Replies
2
Views
1K
Does the series converge using the integral test?
  • · Replies 16 ·
Replies
16
Views
4K
Distinguish between sign test and Wilcoxon signed rank test
  • · Replies 7 ·
Replies
7
Views
2K
Is a Two-Tailed Test Appropriate for Analyzing Plant Position and Seed Count?
  • · Replies 15 ·
Replies
15
Views
2K
Is the claim of 18mg of nicotine per cigarette accurate?
  • · Replies 2 ·
Replies
2
Views
2K
Testing of the hypothesis of variance
  • · Replies 8 ·
Replies
8
Views
2K
Test the following series for convergence or divergence
  • · Replies 7 ·
Replies
7
Views
2K