How do the results depend on the sample size? Return to the Gallup Poll setting of Exercise 5.60. We are supposing that the proportion of all adults who think that having two children is ideal is p 0.53. What is the probability that a sample proportion p falls between 0.49 and 0.57 (that is, within 4 percentage points of the true p2 if the sample is an SRS of size n 300? Of size n 5000? Combine these results with your work in Exercise 5.60 to make a general statement about the effect of larger samples in a sample survey. 5.6
STATS 241 Week 9 Chapter 10 Part 2 Two cases of testing for the mean of two independent samples: ● Two samples will be selected from populations with equal variance ● Two samples will be selected from populations with different variances *If it’s unknown if population variance is equal or unequal, assume that they are unequal Chapter 11 ANOVA- the statistical technique used to compare the means of three or more
