Mathematics, 21.12.2019 21:31 314180
Augusto wants to prove to his parents that watching tv while he does his homework will him get better grades. he decides to ask 20 of his friends if they watch tv while they do their homework and what their grades are. he finds that his friends who have high grades also watch tv while they do their homework. he tells his parents that he has proven that watching tv while doing homework will cause his grades to improve. what mistake has augusto made?
he did not use a random sample, and he tried to show cause and effect with an observational study.
he did not use a random sample, and he tried to show cause and effect with an experiment.
he did not separate his friends into different groups, and he didn't apply a treatment.
he did not separate his friends into different groups, and he used a survey to collect data.
Answers: 2
Mathematics, 21.06.2019 16:00
The level of co2 emissions, f(x), in metric tons, from the town of fairfax x years after they started recording is shown in the table below. x 2 4 6 8 10 f(x) 26,460 29,172.15 32,162.29 35,458.93 39,093.47 select the true statement.
Answers: 1
Mathematics, 21.06.2019 16:50
Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.
Answers: 2
Mathematics, 21.06.2019 21:30
Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244
Answers: 1
Mathematics, 21.06.2019 22:30
The area of a circle is equal to 1 dm². find the radius of the circle.
Answers: 1
Augusto wants to prove to his parents that watching tv while he does his homework will him get bett...
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