1A) Another file containing the means of random samples of various sizes (n = 10, 20 and 30) from the population of female mosquito fish (randomsamplemeans.xls) is available to you all.

In Excel, for each of the three sample sizes, draw a graph showing the means and 95% CIs. Also, draw a line on the graph showing the population mean (? = 34.29 mm). Set the Y axis scale so that it ranges from 25 to 45 units on all three graphs, give the axes a label. That will make them easier to compare visually.

Your graphs should look like the plot in the attachment (except that you have different sample means and a different total number of samples to plot):

45 40 Mean Length (mm) 35 30 25 O 5 10 15 20 Sample Number