A multiple choice test has 30 questions, and each has four possible answers, of which one is correct. If a student guesses on every question, find the probability of getting exactly 6 correct.
A) 0 B) 144.9646 C) 0.14546 D) 104.72847
Q. 2x = 38, n = 50, 90 level
A) 0.683 to 0.837 B) 0.668 to 0.852 C) 0.642 to 0.878 D) 0.661 to 0.859
Q. 3The repair costs for five cars which were crashed by a safety testing organization were as follows:
100, 120, 180, 220, and 130. Find the mean cost of repair.
A) 170 B) 140 C) 150 D) 160
Q. 4x = 33, n = 80, 99 level
A) 0.305 to 0.52 B) 0.254 to 0.571 C) 0.271 to 0.554 D) 0.284 to 0.541
Q. 5In a certain college, 20 of the physics majors belong to ethnic minorities. If 10 students are selected at random from the physics majors, what is the probability that exactly 2 belong to an ethnic minority?
A) 0.30199 B) 0.00671 C) 0.00007 D) 1.8
Q. 6The average speed of cars passing a busy intersection between 4:30 P.M. and 6:30 P.M. on a Friday is 32.3 mi/h.
A) Discrete B) Continuous
Q. 7The average age of the 65 students in Ms. Hope's political science class is 21 years 7 months.
A) statistic B) parameter
Quick Reply
