Question

In: Statistics and Probability

An ASU student spends (in normal times) an average of 1.2 hours to get to campus...

An ASU student spends (in normal times) an average of 1.2 hours to get to campus with a standard deviation of 0.2 hours.

  1. (a) (6 pts) Find the probability the average daily commute time for a period of 36 working days is between 1:15 in 1.25 hours.

  2. (b) (6 pts) Find the probability the total commute time for the 36 days is less than 40 hours.

  3. (c) (5 pts) What assumptions are necessary for the answers in parts (a) and (b) to be valid approximations.

Solutions

Expert Solution

orchestra answered 2 years ago
Next > < Previous

Related Solutions

A typical college student spends an average of 2.55 hours a day using a computer. A...
A typical college student spends an average of 2.55 hours a day using a computer. A sample of 13 students at The University of Findlay revealed the sample mean of 2.70 hours and sample standard deviation of 0.51 hours. Can we conclude that the mean number of hours per day using the computer by students at The University of Findlay is the same as the typical student’s usage? Use the five step hypothesis testing procedure and the 0.05 significance level.
3. It is commonly said that the average college student spends 10 hours per week on...
3. It is commonly said that the average college student spends 10 hours per week on the Internet. It is common knowledge that the population standard deviation is 16 hours/week. You believe that the true average time that college students spend on the Internet should not be 10 hours per week, and decide to collect your own sample for a hypothesis test. You randomly sample 250 students from your college and find that on average they spent 12.5 hours a...
According to one study, an average student spends 4.4 hours on leisure activities per day. Assuming...
According to one study, an average student spends 4.4 hours on leisure activities per day. Assuming that the standard deviation of leisure activities per day is .5 hour. You took a sample of 16 students. Calculate the following: a. What is the probability that sample mean of leisure activities per day is more than 4.5 hours? b. Sample mean of leisure activities per day lies between 4.6 and 4.9 hours? c. Sample mean of leisure activities per day is less...
National statistics show that the average middle school student spends 8.694 hours per week playing video...
National statistics show that the average middle school student spends 8.694 hours per week playing video games. A random sample of 12 middle school students reveals the following times in hours each student spent playing video games. 4.50 9.75 9.50 8.25 5.00 14.50 11.00 4.00 8.25 11.25 11.75 15.50 Has the national average changed? State the hypotheses, check conditions, compute test statistics, standardize and give degrees of freedom. Include a sketch, state the p-value followed by your conclusion.
You decide to study an important question of the average height of the ASU student body....
You decide to study an important question of the average height of the ASU student body. The answer to this question is essential to your future, so we need to study it correctly. You decide to sample 64 students. You set up the following test: H_o: HYB Average height ≥ 59 inches H_a: Average height < 59 inches. 1) Draw the table that shows the 4 possible scenarios of Reality vs. Experimental Outcome. What are the types of errors? Which...
A statistics instructor wants to examine the relationship between the hours a student spends studying for...
A statistics instructor wants to examine the relationship between the hours a student spends studying for the final exam (Hours) and a student's grade on the final exam (Grade). She takes a sample of five students. Student x (Hours) y (Grade) 1 8 75 2 2 47 3 3 50 4 15 88 5 25 93 a. Computer the Average and Standard Deviation for x and y USING EXCEL. b. Computer the sample covariance for x & y USING EXCEL...
Scott is a junior business major. He is a good student and spends many hours studying....
Scott is a junior business major. He is a good student and spends many hours studying. His exercise consists of walking to classes and to the library. He loves to eat at Burger King at least three times a week. He is 5 foot 10 inches tall and weighs 243 pounds. A 3-day dietary analysis reveals that Scott eats on an average day: 423 gm of carbohydrate, 188 gm of fat, and 211 gm of protein. 1.How many total calories...
A university student typically spends 15 hours a week on part-time jobs. An officer at a...
A university student typically spends 15 hours a week on part-time jobs. An officer at a university wants to determine if this amount has changed with the current recession and increase in tuition fees. A sample of 39 students who hold part-time jobs is summarized and has sample mean, = 16.69 and sample standard deviation, s = 7.61. a) Investigate if there is a reason to believe that there is a change in the average amount of time per week...
A university student typically spends 15 hours a week on part-time jobs. An officer at a...
A university student typically spends 15 hours a week on part-time jobs. An officer at a university wants to determine if this amount has changed with the current recession and increase in tuition fees. A sample of 39 students who hold part-time jobs is summarized and has sample mean, = 16.69 and sample standard deviation, s = 7.61. a) Investigate if there is a reason to believe that there is a change in the average amount of time per week...
Each month Old Billie spends between 5 and 45 hours in jail. All of these times...
Each month Old Billie spends between 5 and 45 hours in jail. All of these times are equally likely. a. Draw a graph of the distribution of Old Billie’s time in jail per month. Make sure to label it appropriately. b. What is the probability that Old Billie spends more than 24 hours in jail in any particular month? c. What is the probability that Old Billie spends exactly 40 hours in jail in any particular month? d. How many...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT