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2.- Assignment M3

This week we will be learning about Bias. Your PowerPoint notes have the essential material and the textbook can help elaborate. This is the first week you will have a data analysis project due. The dataset you need is posted in the materials folder so you should download it from BB and open it with SPSS. I have included screenshots in the PowerPoint notes and your book goes step by step. Remember that there are multiple ways to get the same answer, so as long as you understand the purpose of the test or task, the means to the end may vary. The write-up example I have provided is already formatted and presented in the way I would like to have you turn yours in. This example is in the 6th Edition of APA - please use the 7th format as your style.

M3: Use dataset provided to conduct tests of normality including skew, kurtosis, and Levene’s test. Interpret results and explain findings. See powerpoint notes for help with these tests. Lastly, formulate solutions to any problems with the data. (Docs attached)

Using the Notebook.sav data, check the assumptions of normality and homogeneity of variance for the two films (ignore sex). Are the assumptions met?

Qn18 Find the indicated probability using the standard normal distribution
P(-1.16 < z < 1.16)
Qn19. Assume the random variable x is normally distributed with mean mu = 50 and standard deviation sigma = 7. Find the indicated probability.
P(x > 43)
Qn20. Use the normal distribution of SAT critical reading scores for which the mean is 514 and the standard deviation is 121. Assume the variable x is normally distribted.
a. What percentage of the SAT verbal scores are less than 550?
b. If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 525?

Using normal and Binomial distribution tables

Qn14. Seventy-six percent of adults want to live to age 100. You randomly select five adults and ask them whether they want to live to age 100. The random variable represents the number of adults who want to live to age 100. Complete parts (a) through (c) below.
probability distribution table.png

Graph the binomial distribution using a histogram and describe its shape.

Qn15. 38% of employees judge their peers by the cleanliness of their workspaces. You randomly select 8 employees and ask them whether they judge their peers by the cleanliness of their workspaces. The random variable represents the number of employees who judge their peers by the cleanliness of their workspaces. Complete parts a through c below.

binomial table.png

Qn16. Find the area of the shaded region under the normal curve. If convenient, use technology to find the area.
standard normal distribution table.png

Qn17. A standardized exam’s scores are normally distributed. In a recent year, the mean test score was 20.8 and the standard deviation was 5.6. The test scores of four students selected at random are 13,23,9, and 36. Find the z-scores that correspond to each value and determine whether any of the values are unusual.

Qn11. Determine whether the random variable X is discrete or continuous. Explain.
Let x represent the amount of rain in City B during April.
random variable table.png
Qn12. Find the mean variance, and standard deviation of the binomial distribution with the given values of n and p.
Qn13. Complete parts (a) and (b) below.
The number of dogs per household in a small town
number of dogs per household.png
Find the mean, variance, and standard deviation of the probability distribution.

DS 123 Statistical Analysis

Assignment 4 instructions

This Assignment consists of two parts: Part 1 includes questions from textbook, and Part 2 is application using JMP. In total, you will be creating 2-3 files for this assignment. For Part 1 you will create either Word file or Excel file (see details below). For Part 2, you will have 1 JMP report files. Hence, you need to submit your all the files in a single attempt. You may submit multiple attempts if you make corrections. But, note that each attempt should contain all files. (Total 20pts)

Part 1. (20pts)

  1. Work on the following problems from the textbook. Clearly indicate how you arrived to solution. You need to show your work to earn credit.
  2. You may solve questions by calculator (not using Excel). Then, use Word document to write down answers. Label question numbers clearly and do not forget to write down your name and section number.
    o You may submit handwritten paper, but make sure it is eligible to read and all the problems should be in a single document (do not submit separate files for each question)
  3. You may also solve questions using Excel/JMP. In this case, submit your Excel file or copy/paste output of JMP file in Word document. Again, make sure to label question numbers and answers clearly. You may use similar template provided in previous assignment.

Question sets:
11.2, 11.4, 11.6

Part 2. (5pts- Extra Credit)
• Use JMP to Conduct ANOVA. Follow instructions indicated in document files named “Using JMP to Conduct Analysis of Variance” (or click here