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ANF produces nonwoven fabric. An important measurement is the tensile strength, which is the strength of the fabric to avoid being torn apart. One customer has specified that the mean tensile strength must fall between 240 g/si (grams per square inch) and 300 g/si. Based on past data, the 3σ control limits for the mean tensile strength are 249 and 285 g/si. Discuss the ability of the process to meet the customer's specifications. Also, if the customer seeks Six Sigma compliance, what are your recommendations?
Based on your experience using ANOVA and Nonparametric tests, what additional information would you recommend to the key decision maker solve the challenges given in a company that provides software solutions to wide range of clients?
What is the probability that the average time spent per customer will be at least 3 minutes?
The mean income of a group of sample observations is $500; the standard deviation is $40. According to Chebyshev's theorem, at least what percent of the incomes will lie between $400 and $600?
To test whether there is a significant mean difference among the three.
How many departments would they need to survey to achieve this level of accuracy with 95% confidence?
Based on a simple random sample of one hundred an analyst estimates the average hourly wage earned by workers in a city to be $30 and computes the margin of error to be $5.
Quality Progress, February 2005, reports on improvements in customer satisfaction and loyalty made by Bank of America. A key measure of customer satisfaction is the response (on a scale from 1 to 10) to the question
An occupational health study was carried out to evaluate the health status of workers. The response is forced expiratory volume (FEV), a measure of respiratory function.
The table given below shows joint probability distribution of X and Y . Determine the covariance between the X and Y ?
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
In a normal distribution of 1,000 aptitude test scores, with a mean of 60 and a standard deviation of 8, how many scores fall:
Standard deviation of $1.2 million in 2009. Suppose a sample of 100 major league players was taken. What was the standard error for the sample mean salary?
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