Upcoming SlideShare
×

# B.6 tests for mean

131 views
105 views

Published on

Published in: Technology, Education
1 Like
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

Views
Total views
131
On SlideShare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
3
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.