(Solved) Math399 Week 5 Discussion: Interpreting Normal Distributions

Read/review the following resources for this activity:

  • Textbook: Chapter 6 (All Sections)
  • Lesson
  • Minimum of 1 scholarly source

Initial Post Instructions

Week 5 Graded Discussion:

Log onto website where you can observe your service bill for the last 12 months (electric bill, cell phone bill, water bill, etc.). If you do NOT feel comfortable sharing this data, you can make up values.

  1. In excel, list the values of your bill for the last 12 months on one column.
  2. Find the sample mean and sample standard deviation of your data.
  3. Pick three bills from the last 12 months and change the values into z-scores. What does the z-score tell you about that particular month?


  1. Between what two values would be considered a normal bill? Remember, being within 2 Standard Deviations is considered normal.
  2. Are any of your bills in the last 12 months unusual? Very unusual?
  3. Are there times when you would accept an “unusual” bill? Explain.

Follow-Up Post Instructions

Respond to at least two peers or one peer and the instructor. Further the dialogue by providing more information and clarification.

Here are some suggested responses–

  1. Compare and contrast your post with a post of a peer.
  2. Explain what you learned by participating in this week’s discussion.

Writing Requirements

  • Minimum of 3 posts (1 initial & 2 follow-up)
  • APA format for in-text citations and list of references


This activity will be graded using the Discussion Grading Rubric. Please review the following link:

Course Outcomes (CO): 5

Due Date for Initial Post: By 11:59 p.m. MT on Wednesday

Due Date for Follow-Up Posts: By 11:59 p.m. MT on Sunday


I have selected my electricity bill for the last 12 months and the values are:
Electricity Bill
January $210
February $180
March $150
April $220…Please click the icon below to purchase the full answer at only $5.