Question

Between 1954 and? 2003, 37

swimmers have crossed Lake Ontario. Both women and men have made the crossing. Below are summary statistics of time it took to cross the lake? (in minutes) of these

18 women and 19 men.

                                                                                                                                             Sex                                                                       

                                                                                                                                             Female mean 1171 sd 199

                                                                                                                                             Male mean 1208 sd 383

a. Calculate the standard error for this problem.? (Recall that this quiz covers Lessons 7 and 8. Do NOT use the methods from Lesson? 9.) Round your answer to the nearest whole number? (no

?decimals!)

Answer 1

SE = sqrt(s1^2/n1 + s2^2/n2)

     = sqrt((199)^2/18 + (383)^2/19)

     = 100