Mathematics, 20.02.2020 04:04 jonathansheehan26
Each of 100 multiple-choice questions on an exam has four possible answers, one of which is correct. For each question, a student guesses by selecting an answer randomly. (a) Specify the distribution of the student's number of correct answers. (b) Find the mean and standard deviation of that distribution. Would it be surprising if the student made at least 50 correct responses? Why? (c) Specify the distribution of (n1, n2, n3, n4) where nj is the number of times the student picked choice j. Find the mean of nj , the variance of nj, the covariance between nj and nk, and the correlation between nj and nk.
Answers: 3
Mathematics, 21.06.2019 21:00
Rewrite the following quadratic functions in intercept or factored form. show your work. f(t) = 20t^2 + 14t - 12
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Mathematics, 21.06.2019 23:20
Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?
Answers: 1
Mathematics, 21.06.2019 23:30
Simplify (8x2 − 1 + 2x3) − (7x3 − 3x2 + 1). −5x3 + 11x2 − 2 5x3 − 11x2 + 2 x3 + 2x2 + x3 x3 − 2x2 − x3
Answers: 1
Each of 100 multiple-choice questions on an exam has four possible answers, one of which is correct....
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