1 / 11

Student Ratings on Century High School Lunch

Student Ratings on Century High School Lunch . Allen Maceda Isaac Avila Brian Pineda Period 2 2011-2012. CA Standards.

amal
Download Presentation

Student Ratings on Century High School Lunch

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. Student Ratings on Century High School Lunch Allen Maceda Isaac Avila Brian Pineda Period 2 2011-2012

  2. CA Standards • 8.0 Students organize and describe distributions of data by using a number of different methods, including frequency tables, histograms, standard 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- value for a statistic for a simple random sample from a normal distribution.

  3. Hypothesis • We believe that the average rating for lunch at Century will be 2 on a 1-5 scale.

  4. Data Collection • We collected data using the cluster sampling method. Our only focus was on the senior class 2012 because they have the most experience eating this food. • A possible bias is asking somebody that doesn’t eat lunch at school. • Another possible bias is asking a person that’s vegan, that only eats salad and fruits.

  5. Data • Ratings on School Lunch (scale of 1-5) • 2, 3, 3, 1, 2, 1, 2, 1, 1, 3, 2, 1, 3, 1, 2, 2, 2, 3, 1, 3, 2, 2, 1, 4, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3

  6. Histogram

  7. Statistics Estimated through our survey the mean rating for Century’s school lunch is 2.05 of 5 with a standard deviation of 0.75

  8. Confidence Interval We are 95% confident that the population mean question is between 1.8178~2.2822.

  9. Hypothesis Testing • Hypothesis: • Test Statistics: P Value = 0.6733 > = 0.05 • Conclusion: At 5% level of significance, we fail to reject the . There is enough evidence to support the claim.

  10. Error Analysis • Our sample mean is a 2.05 rating, and the 95% confidence level for the population mean is between a 1.8 to 2.3 rating. The marginal error is about 1/2 or .5 of a rating. • Our sample error is caused by an unrepresented part of the population. Which can be either the people we skipped while surveying, as it was a cluster survey concentrated on the senior class of 2012. As well as students that where absent.

  11. Conclusion • We believe that the average rating for lunch at Century will be 2 on a 1-5 scale. Estimated through our survey the mean rating for Century’s school lunch is 2 of 5 with a standard deviation of 0.75. We are 95% confident that the population mean question is between 1.8178~2.2822. At 5% level of significance, we fail to reject the . There is enough evidence to support the claim.

More Related