# Stat homeowrk assignment 1 | Numerical analysis homework help

Homework Assignment #1
Name: __________________________
All calculations should be done in Word using Equation Editor and all charts and graphs should be done in Excel.

1)A manufacturing company produces steel housings for electrical equipment.  The main component part of the housing is a steel trough that is made out of 14-gauge steel coil.  It is produced using a 250-ton progressive punch press with a wipe-down operation that puts two 90-degree forms in a flat steel to make the trough.  The company requires that the width of the trough be between 8.31 inches and 8.43 inches.  Data are collected from a sample of 49 troughs.
8.312   8.343   8.317   8.383   8.348   8.410   8.351   8.373   8.481   8.422   8.476   8.382   8.484   8.403
8.414   8.419   8.385   8.465   8.498   8.447   8.436   8.413   8.489   8.414   8.481   8.415   8.479   8.429
8.458   8.462   8.460   8.444   8.429   8.460   8.412   8.420   8.410   8.405   8.323   8.420   8.396   8.447
8.405   8.439   8.411   8.427   8.420   8.498   8.409

a) Construct a frequency distribution, percentage distribution, cumulative frequency, and a cumulative percentage distribution.

Class Interval Frequency Percentage Cumulative Frequency Cumulative Percentage

b) Construct a frequency distribution histogram, a cumulative frequency histogram, a cumulative percentage polygon plot and a percentage distribution pie chart using excel.

Paste charts from Excel below:

c) What can you conclude about the number of trough that will meet the company’s requirements of troughs being between 8.31 and 8.43 inches wide?

2)If the data set has a mean of 10.0 seconds and a standard deviation of 2.0 seconds, what is the corresponding z-score to the time of 4.0 seconds?

3)Suppose 95% of the data falls between 12.4 and 46.8 units.  Using the empirical rule, give an estimate of the standard deviation.

4)Make a stem and leaf plot of the data, what is the shape of the data
45, 111, 105, 50, 48, 77, 71, 51, 55, 92, 56, 57, 65, 62, 51, 68, 44, 68, 57, 62, 91, 57

Insert stem and leaf plot below:

5)Use the 22 average daily temperatures and the 22 corresponding 22 amounts of energy consumption (kWh) to construct a scatter plot in Excel.  Based on the graph, is there a relationship between the 2 variables?  Identify at least one reason as to why there is or isn’t a relationship.

Average Daily Temp. kWh
29 3637
37 2888
57 2359
74 3704
66 3432
47 2446
28 4463
41 2482
54 2762
68 2288
62 2423
42 3375
26 2661
34 2073
58 2579
72 2858
67 2296
48 2812
33 2433
39 2266
66 3128
71 3286

Paste charts from Excel below:

6)The following data contains the overall miles per gallon of 2009 sedans priced under \$20,000.
27   31   30   28   27   24   29   32   31   27   26   25   26   25   24

a) Compute the mean, median, mode, variance, standard deviation, range, and coefficient of variation, Q1 (Quartile 1) and Q3 (Quartile 3) using Excel.

Cut and paste cells from Excel below:

b) What is the shape of the data?  How do you know?

Calculate the price
Pages (550 words)
\$0.00
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with Australia Assessments
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
Testimonials
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
English 101
Good response. Next time, properly capitalize headings in the requested style.
Customer 460641, March 30th, 2022
Management
support is great. I am grateful to you and your company. thank you very much.
Customer 454227, April 6th, 2020
Medicine
Properly format papers in the instructed style and always use Grammarly.
Customer 458101, April 10th, 2022
Accounting
Thank you!
Customer 454299, April 21st, 2020
Computer science
I proofread the filled template. It was very helpful to understand what mistakes I had done in my first-week assignment. I learned about the topics.
Customer 462947, May 7th, 2022
English 101
Good work.
Customer 453625, May 25th, 2022
Other
Excellent.
Customer 454463, May 5th, 2022
Human Resources Management (HRM)
It's great. I recommend the writer.
Customer 454223, April 9th, 2020
Nursing
Excellent work. Had a few issues but tutor stayed in contact and produced a succinct and quality paper.
Customer 453939, April 26th, 2020
ASCI 491: Operational Applications in Aeronautics
Excellent progression.
Customer 457731, April 21st, 2022
English 101
Good paper.
Customer 458101, April 4th, 2022
MGMT 221 Introduction to Management Information System
Thank you!
Customer 457731, February 2nd, 2022
11,595
Customer reviews in total
96%
Current satisfaction rate
3 pages
Average paper length
37%
Customers referred by a friend