let x be the random variable that represent the lenght of time it takes a student...
let x be the random variable that represent the lenght of time it takes a student to complete maths 23 exam. it was found that x has an approximately normal distribution with mean 1.5 hours and standard deviation =025 hours. (a) what is the probability that it takes at least 1.4 hours for a randomly selected student to complete the exam? (b) suppose 25 students are selected at random,what is the probability that the mean time x of completing the exam for these 25 students is no more than 1.4 hours?
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let x be the random variable that represent the lenght of time
it takes a student...
4. Let x be a random variable that represents the length of time it takes a...
4. Let x be a random variable that represents the length of time it takes a student to complete a chemistry lab project. From long experience, it is known that x has a normal distribution with mean 1 3 .6 hours and standard deviation - 0.5. Find the chance that a student will take more than 4.5 hours to complete a lab project. 5. Using the information from #4, calculato the chance that the mean length of time for a...
The amount of time it takes for a student to complete a statistics quiz is uniformly...
The amount of time it takes for a student to complete a statistics quiz is uniformly distributed between 84 and 107 minutes. One student is selected at random a. the probabilty density fuction f(x) b.The student completes the quiz in exactly 92.35 minutes. c.The student completes the quiz in a time between 89 and 97 minutes. d. Find the longest completion time, a such that a student would be in the quickest 15% of test takers. (Ex. find a such...
Let x denote the time it takes to run a road race. Suppose x is approximately...
Let x denote the time it takes to run a road race. Suppose x is approximately normally distributed with a mean of 195 minutes and a standard deviation of 24 minutes. If one runner is selected at random, what is the probability that this runner will complete this road race in less than 187 minutes? Round your answer to four decimal places. Attach File Browse My Computer Browse Dropbox Browse Content Collection QUESTION 5 The GPAs of all students enrolled...
Let x denote the time it takes to run a road race. Suppose x is approximately...
Let x denote the time it takes to run a road race. Suppose x is approximately normally distributed with a mean of 190 minutes and a standard deviation of 21 minutes. If one runner is selected at random, what is the probability that this runner will complete this road race in less than 158 minutes? Round answer to 4 decimal places.
Let x denote the time it takes to run a road race. Suppose x is approximately...
Let x denote the time it takes to run a road race. Suppose x is approximately normally distributed with a mean of 190 minutes and a standard deviation of 21 minutes. If one runner is selected at random, what is the probability that this runner will complete this road race in less than 162 minutes? Round your answer to four decimal places.
(4) The time required to complete a final exam in a particular college course is normally...
(4) The time required to complete a final exam in a particular college course is normally distributed with a mean of 75 minutes and a standard deviation of 15 minutes. Answer the following questions: (a) (for a randomly selected student) What is the probability of completing the exam in 1 hour or less? (4) (b) What is the probability a randomly selected student will complete the exam in more than 60 minutes but less than 75 minutes? (4b) (c) Assume...
conducts an experiment in which they tip a coin 10 times and count of heads. Let the random represent varlable X represent the number of heads. Write the distribution of x In a class of 40 studen...
conducts an experiment in which they tip a coin 10 times and count of heads. Let the random represent varlable X represent the number of heads. Write the distribution of x In a class of 40 students, each student conducts an experiment in which they flip a coin 10 times and count the number of heads. Let the random variable&represent the mean number of heads found by the students Write the distribution of á 8) One student conducts an experiment...
The amount of time it takes for a student to complete a statistics quiz is uniformly...
The amount of time it takes for a student to complete a statistics quiz is uniformly distributed (or, given by a random variable that is uniformly distributed) between 25 and 59 minutes. One student is selected at random. Find the probability of the following events. A. The student requires more than 54 minutes to complete the quiz. Probability = B. The student completes the quiz in a time between 30 and 35 minutes. Probability = C. The student completes the...
(1 point) The amount of time it takes for a student to complete a statistics quiz...
(1 point) The amount of time it takes for a student to complete a statistics quiz is uniformly distributed (or, given by a random variable that is uniformly distributed) between 25 and 55 minutes. One student is selected at random. Find the probability of the following events. A. The student requires more than 50 minutes to complete the quiz. Probability B. The student completes the quiz in a time between 29 and 34 minutes. Probability C. The student completes the...
4. Let x be a random variable that represents the length of time it takes a student to complete a chemistry lab project. From long experience, it is known that x has a normal distribution with mean 1 3 .6 hours and standard deviation - 0.5. Find the chance that a student will take more than 4.5 hours to complete a lab project. 5. Using the information from #4, calculato the chance that the mean length of time for a...
Let x denote the time it takes to run a road race. Suppose x is approximately normally distributed with a mean of 195 minutes and a standard deviation of 24 minutes. If one runner is selected at random, what is the probability that this runner will complete this road race in less than 187 minutes? Round your answer to four decimal places. Attach File Browse My Computer Browse Dropbox Browse Content Collection QUESTION 5 The GPAs of all students enrolled...
(4) The time required to complete a final exam in a particular college course is normally distributed with a mean of 75 minutes and a standard deviation of 15 minutes. Answer the following questions: (a) (for a randomly selected student) What is the probability of completing the exam in 1 hour or less? (4) (b) What is the probability a randomly selected student will complete the exam in more than 60 minutes but less than 75 minutes? (4b) (c) Assume...
conducts an experiment in which they tip a coin 10 times and count of heads. Let the random represent varlable X represent the number of heads. Write the distribution of x In a class of 40 students, each student conducts an experiment in which they flip a coin 10 times and count the number of heads. Let the random variable&represent the mean number of heads found by the students Write the distribution of á 8) One student conducts an experiment...
(1 point) The amount of time it takes for a student to complete a statistics quiz is uniformly distributed (or, given by a random variable that is uniformly distributed) between 25 and 55 minutes. One student is selected at random. Find the probability of the following events. A. The student requires more than 50 minutes to complete the quiz. Probability B. The student completes the quiz in a time between 29 and 34 minutes. Probability C. The student completes the...
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