Student Ratings on Century High School Lunch Allen Maceda Isaac Avila Brian Pineda Period

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 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 Students determine the P- value for a statistic for a simple random sample from a normal distribution.

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

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.

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

Histogram

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

Confidence Interval We are 95% confident that the population mean question is between ~

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

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 As well as students that where absent.

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 We are 95% confident that the population mean question is between ~ At 5% level of significance, we fail to reject the. There is enough evidence to support the claim.