Should the formula for calculation of the sample size include the expected response rate? If I am not wrong, an existing formula implies 100% response rate! What if my expected response rate is 10%? I have population N=33500 and my calculated sample size is 380 (confidence level of 95% with a margin of error of 5%). If my expected response rate is 10% should I sent an email invitation to 3800 persons to make sure that I will have 380 responses? Another question is about randomness of my sample. I can randomly chose the 3800 potential participants but my sample still will not be random duo to the non-response bias. Is there any way to make sure that sample is really random?
To add vertical reference lines at the mean (or another location), double-click on the plot to open the Chart Editor, then click Options > X Axis Reference Line . In the Properties window, you can enter a specific location on the x-axis for the vertical line, or you can choose to have the reference line at the mean or median of the sample data (using the sample data). Click Apply to make sure your new line is added to the chart. Here, we have added two reference lines: one at the sample mean (the solid black line), and the other at (the dashed red line).
First, the rules for writing any recommendations apply: the letter should be specific about your relationship to the student, and the length of time you have known them, and offer a candid and detailed assessment of their abilities. The most useful general rule I can give you to guide you as you write for the Rhodes is that the program is both academic and ambassadorial, and the program takes both functions very seriously. We will be sending our students out as individual scholars and as cultural ambassadors who we believe will have a productive experience and be good representatives of Willamette, of their home communities, and of their country. This much is true of the Fulbright and most other programs that take our graduates abroad. For the Rhodes you must also stress the student’s potential to be an important contributor to their discipline, and the ways in which their service and leadership are not just strong, but extraordinary. You may not be able to comment on all areas of their experience, but for the UK programs it is especially important to provide as much detail as you can in the areas where you know the student well. Finally, one of the key ingredients for the UK programs is that the applicant be able to make a strong case for why the program they wish to pursue is the absolute best way for them to receive the training and experience they desire; any information you can add to support that case can be helpful (this curriculum would be difficult or impossible to achieve in the . for example, or the UK program would allow them access to unique resources such as interdisciplinary or inter-institution collaborative projects).