Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

B.6 tests for mean


Published on

Published in: Technology, Education
  • Be the first to comment

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.