TI-83 Excel Sketchpad formulas

      MAT123 Spring 2025 Notes

Comments ... Project Info Hi,       The course outline says you are to "collect data (n=35) and construct 90% CI estimate for mean home cost in Edison NJ" but you do not meet in a class and no data has been supplied for online courses, so, "we punt," and that means much more work for me as it has this whole semester.       Because I posted support material for confidence interval and hypothesis testing for last week, you should already have a good idea of what to expect.       Below are the Rutgers titles from: The New Jersey MOD IV Historical Database, mod_iv_year: 2024 by Mr. Marc Pfeiffer & Lucas Marxen that I am considering to use as possible title from which you may choose a project to study.       As stated last week, the project has two parts: a. a 1-variable statistical analysis (which must also include your choice of statistical illustration) and a hypothesis test (testing a hypothesis of your choice, including alpha, and the type of test you feel appropriate) AND THE TOPIC YOU DID THE 1-VARIABLE ANALYSIS and confidence interval on.       The course outline requires you to "collect data (n=35) and construct 90% CI estimate for mean home cost in Edison NJ." You will collect data IN THE SPREADSHEET I SUPPLY and construct whatever % confidence interval seems appropriate on whatever topic is listed in the spreadsheet.       Instead of the department's Friday 4/25 assignment/lab, you will be handing in Part A of the project.       Sample of confidence interval presentation and also 1-variable statistice notes and ways to produce an illustration are shown below. You are also welcome to use a spreadsheet from a prior class or a web page as found on OMNI.       I will likely have the spreadsheet by Wednesday. For now make sure you have completed at least your study of confidence interval in the book and with the sources below. Go with confidence.   Stay safe, A2

8.4 Confidence Interval (Home Costs)

a) Students collect data (n=35) and construct 90% CI estimate for mean home cost in Edison NJ

b) Use s as approximation for σ when constructing CI estimate for mean home cost

      See 6 sample confidence intervals below

 

"All of Statistics I in 2.5 Hours" VIDEO

Confidence Intervals begins at (hours:minutes:seconds) 1:46:03

 

"All of Statistics I in 2.5 Hours" WEB PAGE SECTION ON CONFIDENCE INTERVAL

confidence interval

 

THE CONFIDENCE INTERVAL WEB PAGE

just confidence interval

 

	sale_price	sale_assessment	land_value	improvement_value	net_taxable_value	calculated_acreage	deed_date_MMDDYY	year_constructed	2024 age of property
mean	575960.5007	232842.914	105906.9617	167758.8265	273605.7185	0.630612014	mean	1978	48	mean
st deviation	2343302.537	754037.233	364639.2736	728952.4035	1056278.845	2.950062091	st deviation	48	80	stdev

© 4/21/2025, A2, Agnes Azzolino mathnstuff.com/math/stat/23sp25.23.htm