1 / 11

How Long Do You Take To Shower?

How Long Do You Take To Shower?. Alan Flores, Kathy Alvarado, Carol Prieto Period: 5 2011-2012. California Standards.

otto
Download Presentation

How Long Do You Take To Shower?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. How Long Do You Take To Shower? Alan Flores, Kathy Alvarado, Carol PrietoPeriod: 5 2011-2012

  2. California Standards • 8.0 Students organize and describe distributions of data by using a number of different methods, including frequency table, histograms, standards line and bar graphs, stem-and –leaf displays, scatter plots, and box-and-whisker plots. • 17.0 Students determine confidence intervals for a simple random sample from a normal distribution of data and determine the sample size required for a desired margin of error. • 18.0 Students determine the P-valve for a statistic for a simple random sample from a normal distribution.

  3. Hypothesis • We believe that the amount to take a shower is 30 minutes.

  4. Data Collection Method • We will collect data by using the random sampling method. We ask every third person we see walking around school.

  5. Data • Length of shower • 25,15,25,30,30,10,15,15,20,25,10,20,10,15,11,15,8,20,10,6,17,25,21,20,13,9,10,10,15,8,12,25,10,5,20,6,10,10,11,19,12,13

  6. Histogram

  7. Statistics • Find sample mean and sample standard deviation . Stat→ test→ 1 var stat • Sample mean x = 15.1428 • Sample Standard deviation sx=6.6426

  8. Confidence Interval Find 95% confidence interval STAT→ Test→ 7. z-interval→ Select “stats” Calculate: (13.13, 17.15) Conclusion: We are 95% confident that the population mean of how long do you take to shower is between 13.13 and 17.15 minutes.

  9. Hypothesis Claim: We believe that the amount to take a shower is 30 minutes. Test Statistics (z-test) At 5% level of significance we reject the claim that there is not enough evidence to support our claim (hypothesis)

  10. Error Analysis Our sample mean is 15.1428 minutes, and the 95% confidence level for the population mean is between 13.134 to 17.152 minutes. The marginal error is about 2.0092 minutes. Our sample error is due to possible under-representation of the population. We might need to take more samples due to people taking a shower, people fail to check their survey by asking students.

  11. Conclusion • We are 95% confident that the population mean how long do you take to shower is between (13.134min to 17.152min)

More Related