Mathematics Elementary School Teachers II - Homework 2 Questions | MATH 110, Assignments of Mathematics

Download Mathematics Elementary School Teachers II - Homework 2 Questions | MATH 110 and more Assignments Mathematics in PDF only on Docsity! MATH 110 HW2 Show all work and justify your answers. Unless the question is trivial, no credit will be given for answers only. 1. From the textbook: 10.3.A.19 (Assume a normal distribution) 2. From the textbook: 10.3.B.5 3. From the textbook: 10.3.B.17 4. From the textbook: 10.3.B.18 (Assume a normal distribution) 5. Suppose Chris took the ACT and placed in the 43rd percentile in a year when the mean and standard deviation were 22.7 and 3.8 respectively. What was Chris’s score on the ACT? 6. For the following data run the CubicReg and the ExpReg commands: X Y 7.1 6.5 .3 8.3 2.7 3.4 .4 8.5 .9 6.2 8.2 13.8 6.9 6 3.1 3.1 9.5 27 .4 9.6 (a) Determine which model provides a beter fit to the data. (b) Write the corresponding regression function f with the parameters rounded to 2 decimal places. (c) Use this function to predict f(12). 7. It is a known fact that every galaxy in the visible universe is moving away from our own galaxy at a measurable rate (hence the universe is expanding). This was first observed by the astronomer Edwin Hubble in the early 1900’s when he compared the individual distances to nearby galaxies and the rate at which they were receding from our own galaxy. The resulting relationship is known as Hubble’s Law and is often cited as the main piece of evidence in support of the Big Bang theory. 1