Answer
To find mean of data add all the numbers in the set of data and divide the sum by the number of addends.
To find range, identify the difference between the highest value and lowest value in the set of data.
Explanation
Mean, mode, median and range are the primary measurements used to get the measures of central tendencies. To get the mean and range; first arrange the data in an ascending order, then identify the highest value and the lowest value in the set. The difference between these two data values gives the range of the set of values. For the mean, add all the set of values and then divide their sum with the number of values in the set of data.
Answer:
Please check the attachment.
Explanation:
avg turnaround time = (38+7+42+33+18)/5= 27.6
avg waiting timee = (33+5+28+23+17)/5= 21.2
And its D, A C in Gantt chart at last and exit time are 33, 38 and 42 mentioned as last three in Gantt chart.
Use ctrl + or - or if in microsoft word, use the zoom tool
Do these questions have given answers already?
Answer:
Data base administrator
Explanation:
The data base administrator is a component of a data model that defines the boundaries of a database, such as maximum and minimum values allowed for a field , constraints and access methods. Database is structured from of data sets.
The data in database use to come from different sources that data must have some boundaries. Database administrator is a part of DBMS. The authorized DBA is responsible for the integrity of data and keeping the data in good manner so at the time of need the data could be accessed rightly. Storage of data has to be done in a way that at time of use or at the time of retrieval the data must be accessed frequently and easily.
Database administrator is responsible to put constraint on the database, for example a person could enter how many digits or alphabets in the required fields or records. Otherwise user could enter irrelevant and lengthy data in the fields so it would be hard to manage data on server due to shortage of the memory. By putting such constraints the size of data could be managed and relevant data could be saved. Secondly, constraints use to be put for security purpose to keep information confidential and secure the certain constraints are mandatory and the data base administrator is responsible for such constraints.
Once the user use to store data on database the data safety and integrity is most important for them. So that DBA will arrange the data in organised form which will give quick access and data length will be managed properly so user could not enter lengthy data to full the repository. DBA put security constraint as well for the satisfaction of user and secure use of the database.
So we could say that dba is most important part of DBMS of any organization.
