6) Mean = (0*27 + 1*170 + 2*304 + 3*272 + 4*19 + 5*10) / (27 + 170 + 304 + 272 + 19 + 10) = 2.14 (ans)
8) P(student drops out) = 0.09
P(student gets GED | drops out) = 0.27
P(students gets GED) = P(student gets GED | drops out) * P(student drops out) = 0.27 * 0.09 = 0.0243 (ans)
Question 8 (1 point) d In a certain high school, the probability that a student drops...
GED: In a certain high school, the probability that a student drops out is 0.05, and the probability that a dropout gets a high school equivalency diploma (GED) is 0.15. What is the probability that a randomly selected student gets a GED? Round your answer to four decimal places, if necessary.The probability that the randomly selected student gets a GED is _______
Question 11 (1 point) The probability that a certain make of car will need repairs in the first six months is 0.33. A dealer sells 4 such cars. What is the probability that at least one of them will require repairs in the first six months? Write only a number as your answer. Round your answer to four decimal places (for example: 0.7319). Do not write as a percentage. Your Answer: Answer
Question 6 (1 point) A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 7 What is the probability that a randomly selected student spent between 26 and 40 hours studying? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage. Your Answer: Answer Question 7 (1.2 points) The...
Question 8 (1 point) A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 15. A sample of 36 students was selected. What is the probability that the average time spent studying for the sample was between 28.7 and 30 hours studying? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write...
Following is the probability distribution for the age of a student at a certain public high school. х 13 14 15 16 17 18 P(x) 0.08 0.24 0.23 0.28 0.14 0.03 a. Find the expected value of the ages. (2 decimal places) b. Find the standard deviation of the ages. (4 decimal places) c. Find the probability that the age of a randomly selected student is 18. d. Would it be unusual for the age of a randomly selected student...
Stay in school: In a recent school year in the state of Washington, there were 320,000 high school students. Of these, 154,000 were girls and 166,000 were boys. Among the girls, 39,000 dropped out of school, and among the boys, 10,300 dropped out. A student is chosen at random. Round the answers to four decimal places.(a) What is the probability that the student is male?(b) What is the probability that the student dropped out?(c) What is the probability that the...
In a recent school year in the state of Washington, there were 325,000 high school students. Of these, 156,000 were girls and 169,000 were boys. Among the girls, 54,500 dropped out of school, and among the boys, 10,400 dropped out. A student is chosen at random. Round the answers to four decimal places. (a) What is the probability that the student is male? (b) What is the probability that the student dropped out? (c) What is the probability that the...
govw.usg edu Question 5 (1.2 points) The probability that a randomly selected individual in a certain community has made an online purchase is 0.34. Suppose that a sample of 11 people from the community is selected, what is the probability that at most 3 of them has made an online purchase? Write only a number as your answer. Round to 2 decimal places (for example 0.24). Do not write as a percentage. Your Answer: Answer Question 6 (1.2 points) At...
The probability that a certain make of car will need repairs in the first six months is 0.35 . A dealer sells 6 such cars. What is the probability that at least one of them will require repairs in the first six months? Write only a number as your answer. Round your answer to four decimal places (for example: 0.7319). Do not write as a percentage.
Question 10 (1 point) Every day, Jorge buys a lottery ticket. Each ticket has probability 0.20 of winning a prize. After 6 days, what is the probability that Jorge has won at least one prize? Write only a number as your answer. Round your answer to four decimal places (for example: 0.7319). Do not write as a percentage. Your Answer: Answer