Show all detail work. Draw map for questions that asked to. I’ve attached an example of what the work should looks like.
3. This question uses the Credit.MTW file in Minitab Express. Data was collected from a sample of 400 adults in the United States. The following information was obtained from each person.
Income (in thousands of dollars), Rating (credit score), Cards (# of), Age, Education, Gender, Student, Married, Ethnicity, Balance (on card(s))
These questions will explore describing and summarizing this data set both visually and numerically.
A.Let’s take a look at the distribution of income in the sample. Use Minitab Express to construct a histogram for income variable. Copy + paste your graph here. [10 points]
B. Describe the shape of your distribution of exercise times from part A. Use statistical terminology. [5 points]
C. Use Minitab Express to compute the following descriptive statistics for the Income variable: mean, median, mode, standard deviation, and interquartile range. Type your answers into the table below. [10 points]
D. What would be the preferred measure of central tendency for the Income variable? Explain why. [5 points]
E. Income under what amount would have a negative z-score in this sample? Explain why. [5 points]
F. What type of graph (from lesson 2) would be appropriate to display the Ethnicity variable? Explain why. [5 points]
G. Use Minitab Express to make the graph you suggested in part F to display the Ethnicity variable. [10 points]
H. Construct a 2-way table for the Ethnicity and Married variables. Copy + paste your graph here.[10 points]
I. Use your table in part H to determine which ethnicity had the highest proportion of married people in the sample. Show any calculations and explain your reasoning. [5 points]
J. What is the probability of randomly selecting someone from the sample who is married and Asian? Remember to show all of your work. [5 points]
K. What is the complement of the probability you found in part J? Compute the probability and explain the meaning in terms of the variables. [5 points]
0 comments