Answer:
The query may still be specified in SQL by using a nested query as follows (not all
implementations may support this type of query):
SELECT DNAME, COUNT (*)
FROM DEPARTMENT, EMPLOYEE
WHERE DNUMBER=DNO AND SEX='M' AND DNO IN ( SELECT DNO
FROM EMPLOYEE
GROUP BY DNO
HAVING AVG (SALARY) > 30000 )
GROUP BY DNAME;
Explanation:
Such considerations include understanding of:
the reasons for and objectives of sampling.
the relationship between accuracy and precision.
the reliability of estimates with varying sample size.
the determination of safe sample sizes for surveys.
the variability of data.
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Answer:
See below
Explanation:
Marginal cost is the additional expenses incurred in producing one more unit of output. Marginal cost is the expenses associated with the production of one extra unit.
In this case, there will be marginal costs in producing the first item. There is no extra unit in the first unit. Marginal costs will be zero. The second item's marginal cost will be the difference between the cost of the second and the first item.
First bike
=0
The fourth bike:
=Forth bike - third bike
=$130 -$110
= $20
The sixth bike
=sixth - fifth
=$210 -$160
=$50
The seventh bike
=seventh - sixth
=$270 -$210
=$60
Answer:
$858,500
Explanation:
Cash paid for operating expenses = Operating expenses + Prepaid rent increase - Salaries payable increase
= $855,000 +$17,000 - $13,500
= $858,500
