Homework must be stapled, legible, and handed in before the beginning of lecture on the date indicated above. If you fail to turn in a homework, or turn it in late, you will receive zero points. Show all of your work, including the symbolic versions of any formulas that you use to derive your answers, round all intermediate and final results out to exactly 2 decimal places, and draw a box around your final answer.
1) [5 pts.] For the following data calculate the range, the inter-quartile range, and mean absolute deviation. (we did the MAD in class for the case of a population, so do that on the homework).
5 3 9 2 0 1 4
2) (5 pts.) Find the variance and the standard deviation. Treat the data as a sample. New data: 5 3 9 2 0 1 3
3) [1 pt.] If the mean of a population (x) is 6, and the standard deviation is 8, then a raw score (i.e., a value of x) of 4 would correspond to a z score of what value?
NOTE: To receive full credit for each of the following problems (3-8), you’ll need to draw a picture of the distribution, indicating the critical areas. As always, read each problem CAREFULLY. Make sure that you understand exactly what is being asked.
4) [3 pts.]
a) What z score has 2.5% of the normal distribution below it?
b) What proportion of the normal curve is above a z score of 1.3?
c) What proportion of the normal curve is between the mean and a z score of 1.3?
5) [5 pts.] A student scores 91 on the midterm exam for Psych 60. Assume the class scores are normally distributed, with a mean (µ) of 65 and standard deviation (σ) of 15. The student’s exam score corresponds to what percentile?
For problems 6-9, use the following information:
In a class on Advanced Water Buffalo Husbandry, the midterm exam raw scores (i.e., the values of x) form a normal distribution, with a mean of 239 and a standard deviation of 37.
6) [5 pts.] What percentage of exam scores are more than 1.5 standard deviations of distance away from the mean?
7) [5 pts.] What proportion of students had an exam score between 180 and 250?
8) [5 pts.] 20% of the students had an exam score that was higher than what value?
9) [5 pts.] Which exam score corresponds to the 67th percentile?
Why Choose Us
At Myhomeworkwriters.com, we always aim at 100% customer satisfaction. As such, we never compromise o the quality of our homework services. Our homework helpers ensure that they craft each paper carefully to match the requirements of the instruction form.
Professional Academic Writers
With Myhomeworkwriters.com, every student is guaranteed high-quality, professionally written papers. We ensure that we hire individuals with high academic qualifications who can maintain our quality policy. These writers undergo further training to sharpen their writing skills, making them more competent in writing academic papers.
Our company maintains a fair pricing system for all academic writing services to ensure affordability. Our pricing system generates quotations based on the properties of individual papers.
My Homework Writers guarantees all students of swift delivery of papers. We understand that time is an essential factor in the academic world. Therefore, we ensure that we deliver the paper on or before the agreed date to give students ample time for reviewing.
Myhomeworkwriters.com maintains a zero-plagiarism policy in all papers. As such, My Homework Writers professional academic writers ensure that they use the students’ instructions to deliver plagiarism-free papers. We are very keen on avoiding any chance of similarities with previous papers.
Customer Support 24/7
Our customer support works around the clock to provide students with assistance or guidance at any time of the day. Students can always communicate with us through our live chat system or our email and receive instant responses. Feel free to contact us via the Chat window or support email: firstname.lastname@example.org.
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
Our Homework Writing Services
My Homework Writers holds a reputation for being a platform that provides high-quality homework writing services. All you need to do is provide us with all the necessary requirements of the paper and wait for quality results.
At My Homework Writers, we have highly qualified academic gurus who will offer great assistance towards completing your essays. Our homework writing service providers are well-versed with all the aspects of developing high-quality and relevant essays.
Admission and Business Papers
With Myhomeworkwriters.com, we will help you secure a position at your desired institution. Our essay writing services include the crafting of admissions papers. We will still help you climb your career ladder by helping you write the official papers that will help you secure a job. We will guide you on how to write an outstanding portfolio or resume.
Editing and Proofreading
Myhomeworkwriters.com has a professional editorial team that will help you organize your paper, paraphrase it, and eliminate any possible mistakes. Also, we will help you check on plagiarism to ensure that your final paper posses quality and originality.
My Homework Writers harbors professional academic writers from diverse academic disciplines. As such, we can develop homework writing services in all academic areas. The simplicity or complexity of the paper does not affect the quality of homework writing services.