At a 4-year university a statistics professor was interested in the demographics of all introductory statistics students. One characteristic studied was the student’s year in school.  The table below gives the probability model for X, the year in school for an introductory statistics student. X 1 2 3 4 Probability  0.08 0.60 0.24 0.08 What year in school can a professor expect a student to be? 

The National Prenatal Statistics Unit of the Sydney Children’s Hospital reports that the mean birth weight of all babies born in Australia in 2011 was 7.48 pounds. A Florida hospital reports that the average weight of 118 babies born there last year was 7.52 pounds, with a standard deviation of 1.31 pounds. If we believe that Florida babies fairly represent American newborns, is there evidence that U.S. babies and Australian babies do not weigh the same amount at birth?   Write the appropriate alternative hypotheses for the test.

The following section is about the FIVE questions from your Decade Selection of Music (you choose two decades from Project 1).

Suppose that a student is randomly selected.  The probability that the student is a senior is 0.22.  The probability that the student has a driver’s license is 0.30.  If the probability that the student is a senior or has a driver’s license is 0.36, what is the probability that the student is a senior and has a driver’s license?

HERE IT IS!!! THE LAST ONE!! In all seriousness, I hope you did enjoy the course this semester.  Even though it was not an ideal teaching and instruction method; I do hope that I made it interesting and fun. In my endeavor to continue to be better could you please let me know what you think I could do to make the course better? I’m not perfect and don’t think I am so could you let me know what about the projects or tests or HW or examples that could be used, etc. where I can get better. I am very open to suggestions so just answering this to give me an idea will give you the 4 points. (nice last bonus)   Please take care and if you need anything then please let me know and I’ll try to help you out! Sincerely, Brian

On New Year’s Eve in Gainesville, the Florida Highway Patrol collected a random sample of 10 drivers arrested for driving under the influence. The Blood Alcohol Content (BAC) was recorded.  The BAC is measured in the number of grams of alcohol per 100 grams of blood.  A 95% confidence interval for the average BAC of drivers arrested in Gainesville on New Year’s Eve was created.  The confidence interval was (0.0953 , 0.1947).  Interpret the confidence interval in terms of the problem. 

Upload your previously done work or type your answers below 3. Construct and interpret a confidence interval for the difference in the mean length of songs between the older decade and the newer decade.   State: Plan: Do: Conclude:

Upload your previously done work or type your answers below  Construct and interpret a confidence interval to infer the population mean of the length of song (in seconds) for your older decade at a 95% confidence level   State: Plan: Do: Conclude:

A new roller coaster at an amusement park requires individuals to be at least 4’ 8” (56 inches) tall to ride.  It is estimated that the heights of 10-year-old boys are normally distributed with a mean of 54.5 inches and a standard deviation of 4.5 inches. This question has, so please answer all three parts. Show all Work. 1) Find the z- score for this problem 2) Construct the most appropriate graph that illustrates the probability that a a ten-year-old boy is tall enough to ride the roller coaster 3) What is the probability that a ten-year-old boy is tall enough to ride the roller coaster?

Upload your previously done work or type your answers below 4. It was recently reported through Fortune Magazine, Quartz / Digital Music News, PRS for music, and the New York Times that songs are shorter now than they were decades ago. However, to be sure, perform a significant test comparing the two decades given. Is there enough significant evidence to say that the two decades are different than each other at ? State: Plan: Do: Conclude:   BONUS: explain how the P-value would change and if the conclusion changes if the alternative hypothesis was lower instead of different