Explain cross joins and how one might result by accident
What will be an ideal response?
In a cross join each record of the first table is matched to every record in the second table. This can happen by accident in a equi join if the developer forgets to include the relationship between the tables in where clause of the join.
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Selected current year company information follows: Net income$15,953 Net sales 712,855 Total liabilities, beginning-year 83,932 Total liabilities, end-of-year 103,201 Total stockholders' equity, beginning-year 198,935 Total stockholders' equity, end-of-year 121,851 The return on total assets is:
A. 2.24% B. 4.67% C. 6.28% D. 2.81% E. 3.64%
A professor would like to assign grades such that 7% of students receive Fs. If the exam average is 62 with a standard deviation of 13, what grade should be the cutoff for an F? (Round your answer.)
A) 43 B) 49 C) 50 D) 55
What statutory duty did the Penn State University officials have regarding Mr. Sandusky's conduct?
a. To report it to the proper authorities b. To terminate Mr. Sandusky c. To report it to the NCAA d. To conduct an investigation
Keystone Generation, Inc. has a project that costs $900,000. It has a 50% chance of paying off $2,000,000 and a 50% chance of paying off $0. What is the expected payoff and the expected profit or loss from the new project?
A) The expected payoff is $1,000,000, and the expected loss is $10,000. B) The expected payoff is $100,000, and the expected profit is $10,000. C) The expected payoff is $100,000, and the expected loss is $100,000. D) The expected payoff is $1,000,000, and the expected profit is $100,000.