STAT 2090 Lecture Notes - Null Hypothesis, Test Statistic
Document Summary
Solutions 1: c = 0. 99 so (1 c)/2 = 0. 01/2 = 0. 005, df = 23; t = 2. 807, textbook question 7. 30 (a): Actual df = 74 but we will use df = 60 in table d. the t value is therefore 2. 000. The estimate of the population average number of hours per month that the university students use the internet on a computer is 28. 5 and s = 23. 1 describes the spread of the said values. Therefore, the 95% con dence interval for the population average number of hours per month is given by. 75(cid:19) = 28. 5 5. 334716 = (23. 16528, 33. 83472). The margin of error was found to be 5. 334716: textbook question 7. 30 (b): The population average number of hours per month that the university students use the internet on a computer is reported to be 0 = 32. 5. H0 : = 32. 5 versus ha : 6= 32. 5.
