1Describe two ways to determine whether your measurement sys

1)Describe two ways to determine whether your measurement system is repeatable and reproducible:

a)

b)   

2)You are interested in developing a control chart. Your dimension of concern is the diameter of a cylindrical part. Every hour you take two measurements. Choose the most appropriate chart.

a)npcat                b)IRchat              c)c chat                    d)bRcht

3)You are interested in developing a second control chart. However, you have collected data on the number of visible scratches on the part. You take a small constant subgroup size of 2 every day. Choose the most appropriate chart.

a)npcat                b)IRchat              c)c chat                    d)bRcht

4)A hypothesis is being tested at alpha = 0.05. At which of the following p-values would the null hypothesis be rejected?

a) 0.150                     b) 0.005                     c) 0.055                     d) 0.350

12) It was reported in USA Today that from 1999 through 2003 the number of daily spam messages sent worldwide was:

(x)Year Number

Year

(y) Spam Messages Sent (billions)

1

1999

1.0

2

2000

2.3

3

2001

4.0

4

2002

5.6

5

2003

7.3

The regression equation was determined to be:   y = –0.73 + 1.59 x

where y is the number of spam messages sent in billions and x is the year number. Using the model, what is the predicted number of spam messages sent in 2004?

a) 9.00 billion           b) 7.85 billion           c) 3,185 billion         d) 8.81 billion

If we want to detect a                      change in the process, we increase our sample size.

a) continuous                       b) larger                     c) smaller                  d) normal

14) Specific models have been developed to aid in the analysis of time series data when usual regression methods are not appropriate. What model uses the average of the last several values of a time series to forecast the next value?

Name of the model:                                                            

15) A strong correlation does not mean a cause-and-effect relationship. Causation is only one explanation of an observed association. What else could produce a strong correlation?

a)Conungactor

b)Cndee

c)Concause

d)lofteabe

Solution

1) two ways to determine whether your measurement system is repeatable and reproducible:

a) have the same sample measured repeatedly by the same person. this reveals the variation in the measurement device

b) how many measure the same sample repeatedly