In a regression study of factors affecting learning time for a certain task (measured in minutes), gender of learner was included as a predictor variable (x2) that was coded x2 = 1 if male and 0 if female. it was found that î²ë 2 = 22.3 and s(î²ë 2) = 3.8.

an observer questioned whether the coding scheme for gender is fair because it results in a positive coefficient, leading to longer learning times for males than females?

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Solve this problem! extra ! 3025/5.5 = a/90.75

Carla was trying to decide what to do saturday evening. she has $100 available to spend for the evening. she has narrowed her choices down to these events: braves game, a concert of an artist she likes, or the georgia aquarium. admission to the braves game is $25, hot dogs cost $10, sodas cost $5. the concert costs $25 for admission, $20 for a souvernir t-shirt, and $10 for a soda. the georgia aquarium has the show of a lifetime with an all you can eat and drink that costs $100. carla does not want to take any driving chances, so in addition to the cost of the aquarium, she will also need to pay for her uber/lyft, which is $15 each way. which option should carla choose if she wants to spend the least? based on that choice, what then is carla's oppotunity cost? fully explain your answer in at least one paragraph.