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i am in exam... please answer these questions 100%
correctely...
please also put graph as required...
In a university class that includes 120 students, mostly non-traditional, the Mean age is 32, with...
In a university class that includes 120 students, mostly non-traditional, the Mean age is 32, with a standard deviation 12 students, and with a normal distribution. Six of these students are international students What is the probability that, if one student is picked at a random, he/she be a teenager (12 to 19 years old)? You need to (somewhat) critically think about this before tackling it!! 1. What is the probability that if ONE student is selected at random, he/she...
In a university class that includes 120 students, mostly non-traditional, the Mean age is 32, with...
In a university class that includes 120 students, mostly non-traditional, the Mean age is 32, with a standard deviation 12 students, and with a narmal distribution. Six of these students are international students. What is the probability that, if one student is picked at a random, he/she be a teenager (12 to 19 years old)? You need to (somewhat) critically think about this before tackling it!! 1. 2. What is the probability that if ONE student is selected at random,...
In a standard university class that includes 120 students, mostly non-traditional, the Mean age is 32,...
In a standard university class that includes 120 students, mostly non-traditional, the Mean age is 32, with a standard deviation 12 students, and with a normal distribution. Six of these students are international students. 1. What is the probability that, if one student is picked at random he/she be a teenager (12 to 19 years old)? You need to (somewhat) critically think about this before tackling it! Show you work.
A student wanted to construct a 95% confidence interval for the average age of students in...
A student wanted to construct a 95% confidence interval for the average age of students in her accounting class. She randomly selected 15 students. The sample mean age was 26.5 years with a sample standard deviation of 2.9 years. What is the 95% confidence interval for the population mean?
A professor of statistics noticed that the marks in his course are normally distributed. He also...
A professor of statistics noticed that the marks in his course are normally distributed. He also noticed that his morning classes average 75% with a standard deviation of 13% on their final exams. His afternoon classes average 76% with a standard deviation of 12%. A. What is the probability that a randomly selected student in the morning class has a higher final exam mark than a randomly selected student from an afternoon class? Probability = .4761 B. What is the...
1. The probability of a teenager owning a surfboard is .43, owning a skateboard is .38,...
1. The probability of a teenager owning a surfboard is .43, owning a skateboard is .38, and owning both is .28 If a teenager is selected at random, find the probability that he or she owns a surfboard or a skateboard. 2. In a class consisting of 15 men and 12 women, two homework papers were selected at random. Find the probability that both papers belong to women. 3. An urn contains 6 red balls, 2 green balls, 1 blue...
We assume that the ages of university students are normally distributed. The average age of UAGM...
We assume that the ages of university students are normally distributed. The average age of UAGM students is 26 years with a standard deviation of 3 years. A student is selected at random. What is the probability that you are under 23? What is the probability that you are over 32 years old? What is the probability that he is between 23 and 32 years old?
The age of a students in a class is a normal random variable. There are 80...
The age of a students in a class is a normal random variable. There are 80 students in our class. I select 9 students randomly and calculate the mean of their ages (sample mean). I repeat this experiment 1,000,000 times. Then I calculate the mean and standard deviation of the 1,000,000 sample means that I measured; the calculated values are 22 and 4, respectively. What is the probability that the age of a randomly selected student in the class is...
The age of a students in a class is a normal random variable. There are 80...
The age of a students in a class is a normal random variable. There are 80 students in our class. I select 9 students randomly and calculate the mean of their ages (sample mean). I repeat this experiment 1,000,000 times. Then I calculate the mean and standard deviation of the 1,000,000 sample means that I measured; the calculated values are 22 and 4, respectively. What is the probability that the age of a randomly selected student in the class is...
3. Exam scores on a certain test are distributed normally, with a mean of 72 and...
3. Exam scores on a certain test are distributed normally, with a mean of 72 and a standard devi- ation of 12. (a) Find the 95th percentile for the exam. (b) Suppose a student who took the exam is selected at random. Find the probability that the student scored between 71 and 73. Draw a graph that illustrates the probability calculated. (C) If you take a simple random sample of 36 students who have taken this exam, what is the...
In a university class that includes 120 students, mostly non-traditional, the Mean age is 32, with a standard deviation 12 students, and with a normal distribution. Six of these students are international students What is the probability that, if one student is picked at a random, he/she be a teenager (12 to 19 years old)? You need to (somewhat) critically think about this before tackling it!! 1. What is the probability that if ONE student is selected at random, he/she...
In a university class that includes 120 students, mostly non-traditional, the Mean age is 32, with a standard deviation 12 students, and with a narmal distribution. Six of these students are international students. What is the probability that, if one student is picked at a random, he/she be a teenager (12 to 19 years old)? You need to (somewhat) critically think about this before tackling it!! 1. 2. What is the probability that if ONE student is selected at random,...
A professor of statistics noticed that the marks in his course are normally distributed. He also noticed that his morning classes average 75% with a standard deviation of 13% on their final exams. His afternoon classes average 76% with a standard deviation of 12%. A. What is the probability that a randomly selected student in the morning class has a higher final exam mark than a randomly selected student from an afternoon class? Probability = .4761 B. What is the...
3. Exam scores on a certain test are distributed normally, with a mean of 72 and a standard devi- ation of 12. (a) Find the 95th percentile for the exam. (b) Suppose a student who took the exam is selected at random. Find the probability that the student scored between 71 and 73. Draw a graph that illustrates the probability calculated. (C) If you take a simple random sample of 36 students who have taken this exam, what is the...
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