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

I'm trying to do the work in excel but having trouble, can you help me?
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 Frequenc y Percentage Cumulativ e Frequency Cumulative Percentage 8.31, 8.35 5 5/49=.1020 10.20% 5 5/49= .1020 10.20% 8.35, 8.39 5 5/49= .1020 10.20% 10 10/49= .2041 20.41% 8.39, 8.43 21 21/49= .4286 42.86% 31 31/49= .6327 63.27% 8.43, 8.47 10 10/49= .2041 20.41% 41 41/49= .8367 83.67% 8.47, 8.51 8 8/49= .1634 16.34% 49 49/49= 1 100% 49 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?
There are 31 troughs that meet the company’s requirements. 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
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