A product that is produced at Ramsey Manufacturing goes through three steps to be built. At step one, the components are assembled by technicians. At step two, the product is sanded, and at step three the product is painted.
The product can become defective if any of these three steps is performed incorrectly. The three steps are done by different people in different locations. We let D1 = defect introduced at step 1, D2 = defect introduced at step 2, and D3 = defect introduced at step three. Based on this situation these three events would be considered to be mutually exclusive. Indicate whether the statement is true or false
Q. 2It is often a good idea to convert frequency distributions to relative frequency distributions when you wish to compare two distributions with different amounts of data.
Indicate whether the statement is true or false
Q. 3For a standardized normal distribution, determine a value, say z0, so that P(-z0 z z0 ) = 0.95.
A) 2.14
B) 1.65
C) 1.96
D) 1.24
Q. 4A local pizza company is interested in estimating the percentage of customers who would take advantage of a coupon offer. To do this, they give the coupon out to a random sample of 100 customers. Of these, 45 actually use the coupon.
At the 95 percent confidence level it would be appropriate for the manager to conclude that possibly as many as 50 percent of his customers will redeem the coupon. Indicate whether the statement is true or false
Q. 5What is the terminal value when the market potential is medium?
A) 1,955
B) (445 )
C) (250 )
D) 1,355
Q. 6The common causes of variation are the ________.
A) variations in the measurement systems of a process alone
B) variations resulted from many small differences in the factors of a process, taken together
C) variations that can be explained
D) variations caused by any one of the factors of a process
Q. 7The management of a department store is interested to estimate the difference in the amount of money spent by female and male shoppers. You are given the following information.
Female Shoppers Male ShoppersSample size 64 49Sample mean 140 125Population standard deviation 10 8A 95 percent confidence interval estimate for the difference between the average purchases of the customers using the two different credit cards is:A) 49 to 64
B) 11.68 to 18.32
C) 125 to 140
D) 8 to 10
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