Project 3 /AN
Project Part 3: Based on the class sample for both age and gender, you will create a 95% confidence interval for the
mean age and the proportion of males in the population of all online college students. Using the same sheet as last week, you will complete the project using the “week 5” tab. This will copy the mean and standard deviation you found from week 3 so be sure to correct any errors with these values on the week 3 tab before completing the week 5 project. There are a few places for “calculations”, this is where you “show your work” and it is required. Just type the numbers and calculations you use to obtain your answer in the box provided, for example, “3+5” would show how the answer 8 was found. Do not put formulas here, put the numbers you used to calculate the answer you obtained.
A few hints as you do the project: Check your notes/videos on which distribution to use for a mean when we do not know the population standard deviation. Also, check which distribution we use for proportions, proportions always use the same distribution. When you get the interpretation step, be sure to include the context of what we are taking about. For example, if birthweight of a sample of babies has a lower bound of 6 lbs and an upper bound of 8.3 lbs I could interpret this as, “We are 95% confident the mean birthweight of babies is between 6 lbs and 8.3 lbs”.
Week 5 Devotion: Confidence intervals are tricky to understand. When we say we have a 95% confidence interval for the mean, this means that 95% of intervals created using random samples like the one we did will contain the actual mean.
The Excel will show what needs to be done. The Calulation field needs to show the calulation
