B.6 tests for mean

131 views
105 views

Published on

Published in: Technology, Education
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
131
On SlideShare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
3
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

B.6 tests for mean

  1. 1. Hypothesis test for a Mean
  2. 2. Conditions
  3. 3. Conducting a Hypothesis test 1- state the hypothesis: Ho & Ha (mutually exclusive) Null hypothesis alternative hypothesis # of tails μ = S μ = S 2 μ= S μ < S 1 (left side tail) μ= S μ > S 1 (right side tail) S represents a specified value that ( μ) the population mean is related to 2- Analysis Plan * one sample t-test to determine whether the hypothesized means differs significantly from the observed sample means (must also find SE and degrees of freedom)
  4. 4. 3- Analyze: find the TS and its associated P-value for a t-test * when the population is at least 10 times larger than the sample size, then the SE can be approximated by: where degrees of freedom = n-1 * TS: t= x - μ x= sample mean SE μ = hypothesized population mean in the null hypothesis *P-value- probability of observing a sample statistic as extreme as the TS (where the TS is a t-score) 4- Interpret- compare the P-value to the significance level and reject null when the P-value is less than the Significance level
  5. 5.

×