STAT 263 Lecture Notes - Lecture 8: Null Hypothesis, Traditional Pop Music, Standard Deviation

• School: Queen's University
• Department: Statistics
• Course: STAT 263
• Professor: Charles Arthur Molson

Document Summary

2 + (n2- 1)s2 n1 + n2 - 2. Difference b/n means (small independent sample situation, pop normally distributed, 1. Welch"s t- test n1 + n2 - 2. Ha: d<0 t=x- 0 s/ n t=5. 2- 0. Aka randomize all aspects so you don"t get unwanted trends. Chapter 13 tests about standard deviation. 0: the mean of a chi square distribution is its df, mode = df- 2, median= df- 0. 7. 0. 29 0. 28 0. 30 0. 29 0. 27 0. 29 0. 29 find s=0. 014 w calc. H0: =0. 010 ha: >0. 010. H0: =0. 040 ha: >0. 040 n=35 s=0. 053. On calc: alpha=0. 01: mode down, 3, 2, lower boundary=2. 72, upper=4, sigma=1, mu=0, 0. 033. Go to t- table and use infinite df b/c you are using z to find t0. 01=2. 326. Tests w two standard deviations. In a previous example we found that samples, n1=5 and n2=5, from normally distributed pop with s1=271. 1 and s2=216. 8. Use the 2% level of sig to test whether there is evidence that.