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# Statistical Figures

### Creating Functions and Graphs

The following data was retrieved from www.cdc.gov. It represents the number of deaths in the United States due to heart Disease and cancer in each of the years; 1985, 1990, 1995, and 2002. Heart Disease: Year:(1985) 771169 Year:(1990) 720058 Year:(1995) 737563 Year:(2002) 696,947 Cancer: Year:(1985) 461563 Year:(1990)

### A. Set up the X-bar control chart. b. Set up an R-bar chart. If you presently have 38,232 customers, determine the actual number of customers that would purchase the new product with a 95% level of confidence. Does rejecting a null hypothesis disprove it?

1. A company makes ball bearings for high quality engine components that demand very close tolerances. The company randomly selects 10 ball bearings every hour. Past experience shows the mean diameter to be .37mm with an average range of .04mm (Average R = .04). a. Set up the X-bar control chart. b. Set up an R-bar chart. A

### Scatter Plot Associations

2) On the axes below, sketch a scatter plot described: a. a strong negative association b. a strong association but r is near 0 c. a week but positive association 3) Of all Presidents since WW11, Jimmy Carter suffered the worst overall approval rating at 45%. George W. Bush's approval rating varied widely. It reache

### Statistical process control involving R-chart & x-bar chart

See attachment for charts. Need help with problems on statistical process control involving R-chart & x-bar chart. Questions: What happened at different times during this shift? Why did management change the UCL in the R chart just after 10 a.m.? Why did it change the LCL in the R chart after 2 p.m.? Why did it

### Stats: Drawing Histograms

The following are distances (in miles) traveled to the workplace by 22 employees of a certain computer company. 7 2 37 32 27 22 16 11 6 1 36 31 25 20 34 34 34 29 29 29 24 24 Draw the histogram for these data using an initial class boundary of .5, an ending class boundary of 45.5, and 5 classes. Note that you can add or

### Histograms, Frequency Polygons, Mean, Median, Mode, Class Mid-Point, Pie and Bar Charts

Q1. The masses of 50 similar castings are measured correct to the nearest 0.1 kg, and the results are shown below. 8.1 7.7 7.4 8.6 7.8 8.1 8.6 8.0 7.3 9.0 9.0 7.3 8.5 7.7 8.3 7.9 7.5 8.1 7.1 7.8 9.1 7.6 8.2 8.4 8.5 9.0 7.8 7.6 8.4 7.7 8.2 9.0 7.2 8.3 7.4 8.1 8.3 8,5 8.7 7.9 7.5 8.9 7.7 7.1 8.2 9.1 7.1 8.8 8.0 8.8 (a) From

### Making a histogram for survey data

Provide 2 histograms (Job satisfaction and Pay satisfaction) according to the Survey Data. Please see the attached file for the data. Thank you!

### Statistical Measurements and Graph

This problem has to do with graphical plotting and calculation for certain distribution. Please outline a detailed response to the questions listed with appropriate graphical and statistical data representation(s). NB. The 90 percent confidence interval is for both the mean and for the variance too. 1. The following are

### Create and interpret histograms from the gasoline price data.

Each month the American Automobile Association (AAA) generates a report on gasoline prices that it distributes to newspapers throughout the state. On February 17, 1999, AAA called a random sample of 51 stations to determine that day's price of unleaded gasoline. The resulting data (in dollars) is shown as follows: 1.07 1.31 1

### Histograms and estimates from those distributions.

Each month the American Automobile Association (AAA) generates a report on gasoline prices that it distributes to newspapers throughout the state. On February 17, 1999, AAA called a random sample of 51 stations to determine that day's price of unleaded gasoline. The resulting data (in dollars) is shown as follows: 1.07 1.31

### Random Sample : Solution Set

Each month the American Automobile Association (AAA) generates a report on gasoline prices that it distributes to newspapers throughout the state. On February 17, 1999, AAA called a random sample of 51 stations to determine that day's price of unleaded gasoline. The resulting data (in dollars) is shown as follows: 1.07 1.31 1

### Operation managment: p-chart , X-bar control chart , R-chart: 3-sigma upper control limit an X-bar control chart , upper limit for an R-chart, lower and upper control limits for a p-chart

4). A manufacturer has been sampling output from a process to help measure the number of defective items the process is producing. The quality manager has taken 20 samples of 20 items each, and has found a total of 10 defective items. Given this data, what would be the lower and upper control limits for a p-chart of this process

### Mean Waiting Times of Customers at DMV

The following are mean waiting times and ranges for customers at local DMV cashier line measured at four different times of the day over the last three days. The times are given in minutes from the time a customer enters the cashier line, until the customer is called to the window. X1-bar =20, R1 = 4; X2-bar = 24, R2 = 8; X3

### Control Charts.As the SPC expert in your company, you must decide on the design of an X-bar chart to be put out on a milling machine. From past experience, you know that the process is running with mean = 10 and a standard deviation = 4. (This is the standard deviation of x, not x-bar). Evaluate the following two candidate X-bar chart designs in terms of alpha, ARL0, beta for the shift indicated, and the resulting ARL1. Perform calculations on the blank page that follows. (30 points total)

Control charts (x-bar chart) As the SPC expert in your company, you must decide on the design of an X-bar chart to be put out on a milling machine. From past experience, you know that the process is running with mean = 10 and a standard deviation = 4. (This is the standard deviation of x, not x-bar). Evaluate the fol

### Problem set

The following True/False, Multiple Choice, and Fill-in-the-Blank Questions are taken from the material covered in Weeks 1-3. Please post your answers in the Assignments newsgroup no later than Day 6, Tuesday, of Week 4. True/False T F 1. Roman letters usually represent population parameters, whereas Greek letters usuall

### Regression Analysis

A). Make scatter plots (using excel) of salary versus years of service for the entire faculty. Do you think that there is a linear relationship between the two variables? Why or why not? b). Find the simple linear regression model with salary as the dependent variable and years of service as the independent variable. c).

### Graphing data for investors

I need to analyze data (portion of the retirement investment portfolio) and graph the not so obvious info (such as total value) in a bar, pie, and line graph. I need to do this in excel and come up with formulas, name for the graphs, Y' and X's. What information should I be looking for as an investor (that's meaningful a