Presentation on theme: "Lucero Sosa Edgar Flores Period 1. California Standards 8.0 Student organized and describe distribution of data by using of different methods, including."— Presentation transcript:
California Standards 8.0 Student organized and describe distribution of data by using of different methods, including frequency table, histogram, standard line and bar graphs, stem-and-leaf displays, scatter plots, and box of whisker plots. 17.0 Students determine confidence interval 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 Student determine the P-value for a statistic for a simple random sample from a normal distribution
Hypothesis We believe the population proportion will be 65% of juniors and seniors dislike Century’s restrooms.
Data Collection Two group members will collect data by using the stratified method, a method that involves the division of population into smaller groups We had a yes or a no answer for 100 students between juniors and seniors, during lunch.
Data StudentsYesNoTotal Seniors163450 Juniors173350 Total3367100
Statistics Sample population is 33/100 =0.33 the totals of “Yes”. Sample population is 67/100=0.67 the total of “No”.
Confidence Interval We are 95% confident the population proportion of students at Century dislike the restrooms is between 24% and 42%.
Hypothesis Testing Hypothesis Test Statistics 1-prop z- test P-Value=1<.05 Conclusion At 5% level of significance, we failed to reject Po. There is enough evidence to support our claim.
Error Analysis Our sample proportion is 33% said yes, and the 95% confidence level for the population proportion is between 24% and 42%. Sample error Our survey could of been a little better if we asked more people. And if we could of teamed up with smarter people.
Conclusion We hypothesized that 65% Century’s Seniors and Juniors students don’t like Century’s restroom. On our survey of 100 students, we found that.33% seniors and juniors do like Century's restroom and 67% don’t like Century’s restroom. Our hypothesis was almost correct.