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EURLIR . WRITINGROOR ILALAR Suppose the distribution of the time X (in hours) spent by students...
The time college students spend on the internet follows a Normal distribution. At Johnson University, the...
The time college students spend on the internet follows a Normal distribution. At Johnson University, the mean time is 6 hours per day with a standard deviation of 1.5 hours per day. If 100 Johnson University students are randomly selected, what is the probability that the average time spent on the internet will be more than 6.2 hours per day? ____________ Round to 4 places. If 100 Johnson University students are randomly selected, what is the probability that the average...
Researchers doing a study comparing time spent on social media and time spent on studying randomly...
Researchers doing a study comparing time spent on social media and time spent on studying randomly sampled 200 students at a major university. They found that students in the sample spent an average of 2.3 hours per day on social media and an average of 1.8 hours per day on studying. If all the students at the university in fact spent 2.2 hours per day on studying, with a standard deviation of 2 hours, the shape of the sampling distribution...
Suppose the time spent by a randomly selected student who uses a terminal connected to a...
Suppose the time spent by a randomly selected student who uses a terminal connected to a local time-sharing computer facility has a gamma distribution with mean 20 min and variance 80 min2. (a) What are the values of α and β? α = β = (b) What is the probability that a student uses the terminal for at most 28 min? (Round your answer to three decimal places.) (c) What is the probability that a student spends between 20...
5. North Carolina State University posts the complete grade distributions for its courses online. The distribution of grades for all students in all sections of Accounting 210 in the spring semester...
5. North Carolina State University posts the complete grade distributions for its courses online. The distribution of grades for all students in all sections of Accounting 210 in the spring semester of 2001 was Grade Probability .18 32 34 09 07 a. Using the scale A -4, B-3, C-2, D- 1, and F 0, let Xbe the grade of a randomly chosen b. Let X denote the mean grade for a random sample of 50 students from Accounting 210. Since...
A survey among freshmen at a certain university revealed that the number of hours spent studying...
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 26 and standard deviation 5. Use the TI-84 PLUS calculator to answer the following. Round the answer to at least four decimal places. (a) What proportion of students studied more than 36 hours? (b) What is the probability that a randomly selected student spent between 13 and 32 hours studying? (c) What proportion of...
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...
Suppose X, the amount of money a student at a university spent on books in 2017,...
Suppose X, the amount of money a student at a university spent on books in 2017, was normally distributed with mean $550 and standard deviation $250 (that is, µ = 550 and σ = 250). Compute the probability that a randomly selected student at this university spent between $520 and $580 on books in 2017 (that is, compute P(520 ≤ X ≤ 580)). (Show work)
The times that college students spend studying per week have a distribution skewed to the right...
The times that college students spend studying per week have a distribution skewed to the right with a mean of 8.6 hours and a standard deviation of 2.8 hours. Find the probability that the mean time spent studying per week for a random sample of 16 college students would be more than 9.1 hours. Round your answer to two decimal places. Attach File Browse My Computer Browse Content Collection Browse Dropbox QUESTION 7 The GPAs of all students enrolled at...
The Director of the Wellness Center is concerned that the number of hours of sleep that students ...
Hours of Sleep during Fall Semester
5.3
5.4
6.4
8.3
5.8
7.5
4.7
6.8
5.9
5.7
6.7
6.6
7.6
6.8
7.3
4.6
6.4
5.8
6.8
4.3
9.3
5.2
8.1
7.1
7.4
7.4
7.4
5.3
5.5
8.3
6.1
7.8
5.5
6.1
7.7
6.5
6.4
4.2
5.2
6.8
7.7
5.5
5.3
4.6
6.4
4.9
7
4.9
5.8
5.7
The Director of the Wellness Center is concerned that the number of hours of sleep that students who livc in thc dorms arc gctting...
I. (15 pointa) Suppose, the time spent by a randomly selected student who uses a terminal...
I. (15 pointa) Suppose, the time spent by a randomly selected student who uses a terminal connected to a local time - sharing computer facility has a exponential distribution with mean 20 min and variance 400 min (a) What is the probability that a student uses the terminal for at most 24 min? (b) What is the probability that a student spends between 20 and 40 min using the terminal?
Researchers doing a study comparing time spent on social media and time spent on studying randomly sampled 200 students at a major university. They found that students in the sample spent an average of 2.3 hours per day on social media and an average of 1.8 hours per day on studying. If all the students at the university in fact spent 2.2 hours per day on studying, with a standard deviation of 2 hours, the shape of the sampling distribution...
5. North Carolina State University posts the complete grade distributions for its courses online. The distribution of grades for all students in all sections of Accounting 210 in the spring semester of 2001 was Grade Probability .18 32 34 09 07 a. Using the scale A -4, B-3, C-2, D- 1, and F 0, let Xbe the grade of a randomly chosen b. Let X denote the mean grade for a random sample of 50 students from Accounting 210. Since...
The times that college students spend studying per week have a distribution skewed to the right with a mean of 8.6 hours and a standard deviation of 2.8 hours. Find the probability that the mean time spent studying per week for a random sample of 16 college students would be more than 9.1 hours. Round your answer to two decimal places. Attach File Browse My Computer Browse Content Collection Browse Dropbox QUESTION 7 The GPAs of all students enrolled at...
Hours of Sleep during Fall Semester
5.3
5.4
6.4
8.3
5.8
7.5
4.7
6.8
5.9
5.7
6.7
6.6
7.6
6.8
7.3
4.6
6.4
5.8
6.8
4.3
9.3
5.2
8.1
7.1
7.4
7.4
7.4
5.3
5.5
8.3
6.1
7.8
5.5
6.1
7.7
6.5
6.4
4.2
5.2
6.8
7.7
5.5
5.3
4.6
6.4
4.9
7
4.9
5.8
5.7
The Director of the Wellness Center is concerned that the number of hours of sleep that students who livc in thc dorms arc gctting...
I. (15 pointa) Suppose, the time spent by a randomly selected student who uses a terminal connected to a local time - sharing computer facility has a exponential distribution with mean 20 min and variance 400 min (a) What is the probability that a student uses the terminal for at most 24 min? (b) What is the probability that a student spends between 20 and 40 min using the terminal?
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