Goreapyk
2022-05-09
1. Explain the importance of Database models.
2. Explain Hierarchical Data Model.
3. Explain Network Data Model.
4. Explain Relational Database Model.
5. Explain Entity Relationship Model.
6. Explain The Object Oriented Model.
7. Explain Data abstraction of 3 schema architecture.
karton
Expert2022-07-25Added 613 answers
Why is data modeling important?
A comprehensive and optimized data model helps create a simplified, logical database that eliminates redundancy, reduces storage requirements, and enables efficient retrieval.
Question 71
a simple binary communication channel carries messages by using only two signals; say 0 and 1. We assume that; for a given binary channel, 40% of the time a 1 is transmitted; the probability that a transmitted 0 is correctly received is 0.90,and the probability that a transmitted 1 is correctly received is 0.95. given 1 is received, probability that 1 was transmitted
The following probability distributions of job satisfaction scores for a sample of information systems (IS) senior executives and middle managers range from a low of 1 (very dissatisfied) to a high of 5 (very satisfied).
My newspaper is delivered late 60 percent of the time. Suppose deliveries can be described as a Bernoulli process and define a random variable X to be the number of late deliveries per year (365 days). Find the mean and standard deviation of X
My newspaper is delivered late 60 percent of the time. Suppose deliveries can be described as a Bernoulli process and define a random variable X to be the number of late deliveries per year (365 days).
i) Find the mean of X and the standard deviation of X
Jordan Decomposition:
Use the method of substitution to solve the following system of equations. If the system is dependent, express the solution set in terms of one of the variables. Leave all fractional answers in fraction for
SHOW ALL WORK. FOLLOW INSTRUCTIONS CAREFULLY PLEASE
Determine whether the series converges or diverges...
The line through the point (1,0,6) and perpendicular to the plane x+3y+z=5 has vector equation r=⟨u,v,w⟩=⟨a,b,c⟩+t⟨d,e,f⟩, with t∈R.
Two minor league baseball players got a total of 368 hits. Washington had 4
more hits than Sanchez. Find the number of hits for each player.
Two minor league baseball players got a total of 368 hits. Washington had 4 more hits than Sanchez. Find the number of hits for each player.
Show that union of two at most countable sets is atmost countable