MATH 225N Week 7 Lab Assignment...

Week 7 Lab Assignment Name:Destinee Kelly Instructor Name: Gregory Allen Please use this template to help answer the questions listed in the lab instructions. The “steps” below refer to the steps listed in the lab instructions. Type your answers and post your screenshots in the spaces given. Write a paragraph summarizing what you learned from the articles provided. Consider the use of confidence intervals in health sciences with these articles as inspiration and insights. The confidence interval is the range of values a studied population will fall. The width of a confidence interval tells us how reliable a sample is. For example, a narrow confidence interval is reliable because the upper and lower limits are close to the mean. A wide confidence interval indicates more data should be collected before a conclusion is drawn. Determining if two confidence intervals are statistically different is done by seeing if the confidence intervals overlap. If the difference in the mean scores does not include zero, they are statistically different. If the confidence interval does include zero the observed difference is not statistically significant. Data Collection Use the data set you collected for the Week 5 lab (heights of 10 different people plus the 10 heights provided by your instructor). (NOTE: This is NOT the data used in the lab video, which is about midterm grades. Do not use the midterm grades data.) 68580013992881 01 Provide a screenshot of your Week 5 Data (20 Heights) Summarize the Preliminary Calculations (Round to 2 decimal places): Sample Mean: _66.95_ Standard Deviation: 4.36_ Your Height: 65 Please answer the following questions in complete sentences: Discuss your method of collection for the values that you are using in your study (systematic, convenience, cluster, stratified, simple random). 68580011205522 2 I used convenience sampling by using my friends that I had over to my house that week. 68580095920583 03 What are some faults with this type of data collection? It is whatever comes to you. You aren’t seeking out different types of people from different area. Sometimes it may not provide enough data or a variety of data. What other types of data collection could you have used, and how might this have affected your study? I could have used random sampling and gone to the mall and randomly selected 10 shoppers. This could have affected my study by giving me a bigger range of heights as there are children and people of all ages at the mall. Calculation of 95% Confidence Interval Give a point estimate (mean) for the average height of all people at the place where you work. W