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 Your Essay Price
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more

Enjoy 10% OFF today with the coupon code: best10