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Students of a large university spend an average of $5 a day on lunch. The standard...
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Students of a large university spend an average of $5 a day on lunch. The standarddeviation of the expenditure is $3. A simple random sample of 36 students is taken.a. What are the expected value and standard deviation of the sampling distributionof the sample mean?b. What is the probability that the sample mean will be at least $4?c. What is the probability that the sample mean will be at least $5.90?
A population of 1,000 students spends an average of $10.50 a day on dinner. The standard...
A population of 1,000 students spends an average of $10.50 a day on dinner. The standard deviation of the expenditure is $3. A simple random sample of 64 students is taken. a. What are the expected value, standard deviation, and shape of the sampling distribution of the sample mean? Answer: 10.5 0.363 normal b. What is the probability that these 64 students will spend a combined total between $10.99 and $11.38? c. What is the probability that these 64 students...
Sampling Distribution 1. A population of 1,000 students spends an average of $10.50 a day on...
Sampling Distribution 1. A population of 1,000 students spends an average of $10.50 a day on dinner. The standard deviation of the expenditure is $3. A simple random sample of 64 students is taken. A. What is the expected value, standard deviation, and shape of the sampling distribution of the sample mean? B. What is the probability that these 64 students will spend a combined total of more than $715.21? C. What is the probability that these 64 students will...
2. (14 pts) A population of 1,000 students spends an average of $10.50 a day on...
2. (14 pts) A population of 1,000 students spends an average of $10.50 a day on dinner. The standard deviation of the expenditure is $3. A simple random sample of 64 students is taken. a. What are the expected value, standard deviation, and shape of the sampling distribution of the sample mean? Explain the reason. Which theorem ensures the shape of the sampling distribution? b. What is the probability that these 64 students will spend a combined total of more...
A population of 1000 students spends an average of 10.50 a day on dinner. The standard...
A population of 1000 students spends an average of 10.50 a day on dinner. The standard deviation of the expenditure is 3.00. A simple random sample of 64 students is taken. a. What is the probability that these 64 students will spend a combined total between 703.59 and 728.45? Show all work. b. What is the probability that these 64 students will spend a combined total of more than 715.21? Show all work
The time that university students spend on the internet follows a normal distribution. At flinders university,...
The time that university students spend on the internet follows a normal distribution. At flinders university, the mean time is 5 hours with a standard deviation of 1.2 hours. What is the probability that the average time 100 random students on campus willl spend more than 5 hours on the internet? a) 0.5 b) 1 c) 0.2 d) 0
A random sample of 75 students at the University of Minnesota spend an average of $614...
A random sample of 75 students at the University of Minnesota spend an average of $614 per month in rent with a standard deviation of $219. The distribution is moderately skewed to the high end. Which of the following statements are true? i. 95% of students at the university spend $564 to $664 on rent. ii. We are 95% confident that the average rent for students at the university is between $564 and $664. iii. Because we cannot examine other...
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 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...
A study was done to compare the amount of time per day students at public and...
A study was done to compare the amount of time per day students at public and private universities spend on Facebook. The study was composed of 200 students from a private university and 300 students from a public university. The time that students at a private university spent on Facebook had a Normal distribution with a mean of 220 minutes and a standard deviation of 36 minutes. The time that students at a public university spent on Facebook had a...
2. (14 pts) A population of 1,000 students spends an average of $10.50 a day on dinner. The standard deviation of the expenditure is $3. A simple random sample of 64 students is taken. a. What are the expected value, standard deviation, and shape of the sampling distribution of the sample mean? Explain the reason. Which theorem ensures the shape of the sampling distribution? b. What is the probability that these 64 students will spend a combined total of more...
A random sample of 75 students at the University of Minnesota spend an average of $614 per month in rent with a standard deviation of $219. The distribution is moderately skewed to the high end. Which of the following statements are true? i. 95% of students at the university spend $564 to $664 on rent. ii. We are 95% confident that the average rent for students at the university is between $564 and $664. iii. Because we cannot examine other...
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...
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