In the Fall 2015 semester, we compared the population mean average weight in pounds of COC Math 140 students to the population mean average weight in pounds of Math 075 students. Population 1:  Math 140 statistics students Population 2:  Math 075 pre-stat students Use the two-population bootstrap confidence interval below to answer the following question.  What confidence level was used? Image_Exam2_Bootstrap_2pop_stat_prestat_weights.pdf

What does the symbol “N” represent?

Use the following sample proportion and margin of error to calculate the upper limit of the confidence interval.  Do not round your answer. Upper Limit = Sample Proportion + Margin of Error Sample Proportion = 0.0875 Margin of Error = 0.0119

If the upper and lower limits of a two population confidence interval are both positive, then what does that tell us about population 1 and population 2?

Use the following sample proportion and margin of error to calculate the lower limit of the confidence interval.  Do not round your answer. Lower Limit = Sample Proportion – Margin of Error Sample Proportion = 0.3872 Margin of Error = 0.0419

Match the following definition to the correct term below. Take many random samples from one real random sample with replacement, calculate a sample statistic like a mean, median, or proportion from each sample and graph all of the sample statistics on the same graph.

The following Confidence Interval upper and lower limits were calculated in order to estimate the population mean average hourly salary of Starbucks baristas. Assume all of the assumptions (conditions) were met. True or False? The population mean average salary for a Starbucks barista is $11.63. Confidence Level = 99% Lower Limit = $8.19 Upper Limit = $15.07 Sample Mean = $11.63 Margin of Error = $3.44 Standard Error = $1.261 Critical Value T-score = 2.728 Degrees of Freedom = 34

Use the upper and lower limit of the confidence interval and the following formula to calculate the sample proportion. Do not round your answer.  Do not convert the proportions into percentages. Lower Limit = 0.518 Upper Limit = 0.623 Sample Proportion = (Upper Limit + Lower Limit) / 2

If a two-population confidence interval has a negative lower limit and a positive upper limit, then what does that tell us about population 1 and population 2?

Use the upper and lower limit of the confidence interval and the following formula to calculate the margin of error. Do not round your answer.  Do not convert the proportions into percentages. Lower Limit = 0.0785 Upper Limit = 0.0813 Margin of Error =