Biostatistics – Calculating Confidence Interval Statistics Project (Statistics Project Sample)
The purpose of this assignment is to practice calculating confidence intervals.
For this assignment, students will utilize Excel and SPSS Statistics and the "Example Dataset."
Using the "Example Dataset," complete the following:
Based on a normal distribution curve, calculate the probability of an individual being 60 years or older in this population. Show the Excel and SPSS formulas or your hand calculations. Include screenshots as needed to illustrate this.
Using the sample standard deviation of age as an estimate of the population standard deviation, calculate by hand the standard error of the mean. Show your calculations and the answer.
Calculate by hand a 95% confidence interval for "Age" based on the sample mean. Use SPSS to verify your answer. Include your calculations and screenshots of the SPSS output.
Interpret the confidence interval for age and explain the three pieces of information needed to calculate a confidence interval.
Submit one Word document that includes all of the assignment deliverables.
APA style is not required, but solid academic writing is expected.
This assignment uses a rubric. Please review the rubric prior to beginning the assignment to become familiar with the expectations for successful completion.
Biostatistics – Calculating Confidence Interval
Subject and Section
November 30, 2019
Assuming a normal distribution, the probability of an individual being 60 years or older in a population is 4.3%. In order to arrive to this answer, the first thing that needs to be done is to find relevant statistical data such as mean and standard deviation. Hence, the author used excel functions such as ‘=average’ and ‘stdev.p’. It must be noted that the estimate assumes that the sample population is representative of the overall population, which is the reason why ‘=stdev.p’ (population) is used instead of ‘=stdev.s’ Nonetheless, either one would have a result of 12. Also, ‘x’ refers to the baseline age, which is 60 years old. The results of the calculations are as follows
Table 1. Results for Mean, SD, and X
From this, the author then used the ‘=1-norm.dist’ function, which helps determine the probability of having the number (age) which is greater than or equal to the X. The computation are as follows.
Figure 1. Excel Computation of Age
YOU MAY ALSO LIKE
- China’s GDP Growth: 1952-2005. Economics Statistics ProjectDescription: China's economy has grown at high rates in the past four decades , which have improved the country’s economy and economic power. In the period 1952 to 1978, the growth rate was 4.7%, and form 1978 then on to 2005 the growth rate has averaged above 8%. ...6 pages/≈1650 words | APA | Mathematics & Economics | Statistics Project |
- SCM Project 1. Lending Club is a lending company in San FransciscoDescription: The Lending Club is a lending company based on San Franscisco, CA. They connect borrowers with investors through an online marketplace. They have provided a publically available data from 2007-2011. I have it under Project files. Please see the data with its data dictionary ...2 pages/≈550 words | APA | Mathematics & Economics | Statistics Project |
- Business Statistics Project. How the truth or falsehood in the hypothesisDescription: An annual report in November 2016 depicted the state of departures by young people in their quest for education. The number of Americans opting to pursue education is rapidly increasing....7 pages/≈1925 words | 3 Sources | APA | Mathematics & Economics | Statistics Project |