Mathematics, 17.12.2019 05:31 kipper5760
Auniversity wants to compare out-of-state applicants' mean sat math scores (μ1) to in-state applicants' mean sat math scores (μ2). the university looks at 35 in-state applicants and 35 out-of-state applicants. the mean sat math score for in-state applicants was 540, with a standard deviation of 20. the mean sat math score for out-of-state applicants was 555, with a standard deviation of 25. it is reasonable to assume the corresponding population standard deviations are equal. to calculate the confidence interval for the difference μ1 − μ2, what is the number of degrees of freedom of the appropriate probability distribution?
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Answers: 3
Mathematics, 21.06.2019 20:00
Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0
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Mathematics, 21.06.2019 20:30
Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.
Answers: 1
Mathematics, 21.06.2019 22:00
Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?
Answers: 2
Mathematics, 22.06.2019 00:00
What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?
Answers: 1
Auniversity wants to compare out-of-state applicants' mean sat math scores (μ1) to in-state applican...
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