单选题The table below summarizes the results of a survey in which families reported the number of television sets they have in their homes. What percent of the families surveyed have two or fewer television sets?A75%B68%C60%D40%E33%

单选题
The table below summarizes the results of a survey in which families reported the number of television sets they have in their homes. What percent of the families surveyed have two or fewer television sets?
A

75%

B

68%

C

60%

D

40%

E

33%


参考解析

解析:
According to the table, 32 + 80 + 160 + 83 + 45 or 400 families were surveyed. Since the number of families with two or fewer television sets is 32 + 80 + 160 or 272, the percent of families surveyed with two or fewer television sets is (272/400)×100% or 68%.

相关考题:

Directions: Study the following table carefully and write a composition on A Survey on Reading. Your composition should be based on the information given in the table. Write 100-120 words to (1) state the amount of reading, reading speed and the results of reading; (2) describe the possible relationship among the variables.A Survey on ReadingThe Results of Survey on ReadingThe Numberof StudentsPercentage ofthe TotalThe Total Amountof Reading in a TermReading Speed(words per hour)Performance(scores)10040%350,0003,000>808032%300,0002,50070-736022%250,0002,00060-69306%<100,0001,500<60July,2000

Which statements are true regarding the Query Result Cache? () A. It can be set at the system, session, or table level.B. It is used only across statements in the same session.C. It can store the results from normal as well as flashback queries.D. It can store the results of queries based on normal, temporary, and dictionary tables.

Examine the structure of the EMPLOYEES table:You need to update the records of employees 103 and 115. The UPDATE statement you specify should update the rows with the values specified below:Which UPDATE statement meets the requirements?()A.B.C.D.E.

Which OSPF router type summarizes network advertisements from one OSPF area into another?() A.AB.BC.CD.D

which address range efficiently summarizes the routing table of the addresses for router main?() A.172.16.0.0/18B.172.16.0.0/16C.172.16.0.0/20D.172.16.0.0/21

For specific reason, the Owner may transfer the classification member of the vessel to another classification member which is covered by the IACS ‘Transfer of Class Agreement’. Which of the requirements listed below is disobey the IACS “Transfer of Class Agreement?()A、For all ships between 5 to 10 years of age a representative number of ballast spaces are to be examined.B、For all ships between 10 to 20 years of age a representative number of cargo spaces are to be examined.C、For all ships 15 years of age and over all overdue surveys and conditions of class completed by the gaining class society before the transfer of class can take place.D、For all ships which are 20 years of age and above or ships subject to ESP which are 15 years of age and above, a full Special Survey or Intermediate Survey, including docking, will be carried out.

table frame=below 只显示一个边框

Which of the following utilities will produce the results printed below?() Tracing route to 172.30.0.78 over a maximum of 30 hops . 1 1 ms 1 ms172.30.0.78 A、tracertB、pingC、arpD、netstat

which address range efficiently summarizes the routing table of the addresses for router main?()A、172.16.0.0/18B、172.16.0.0/16C、172.16.0.0/20D、172.16.0.0/21

The statements below compare and contrast link state and distance vector routing protocols. Which of these are true?()A、Distance vector protocols send the entire routing table to directly connected neighbors.B、Distance vector protocols are responsible for sending updates to all networks listed in the routing table.C、Link state protocols are responsible for sending the entire routing table to the whole network.D、Link state protocols send updates regarding their own links status to all other routers on the network.

Which statement about active and passive surveys is incorrect?()A、Active mode does not require the client to be specifically confguredB、Passive mode can survey more than one access point at a timeC、Active mode yields signal-quality information such as packet retries and lost packetsD、Active mode requires more time to survey but yields more information results than passive mode does

After a baseline check was completed it was noted that the network was working far below the level of the last baseline. Which of the following should the technician do NEXT to determine where the network problems are occurring?()A、Upgrade the firmware on all routers and switchesB、Reboot the entire network one device at a timeC、Conduct a network traffic analysisD、Rerun the baseline to ensure the results were correct

You issued the following statement in your SQL*Plus session:   SQLALTER SESSION ENABLE RESUMABLE TIMEOUT 600;   Which operation is neither suspended nor resumed using the Automatic Resumable Allocation feature in your database?()A、 creating a table in your schema and you exceed your allocated space quota on the tablespaceB、 executing a long query that involves a sort operation and the statement runs out of temporary spaceC、 loading data into tables by using the SQL*Loader and the number of extents in the table reaches the maximum limitD、 creating a table in a dictionary-managed tablespace with an explicit MAXEXTENTS setting which results in an out of space error

You need to perform these tasks: 1. Create and assign a MANAGER role to Blake and Clark 2. Grant CREATE TABLE and CREATE VIEW privileges to Blake and Clark Which set of SQL statements achieves the desired results?()A、CREATE ROLE manager; GRANT create table, create view TO manager; GRANT manager TO BLACK, CLARK;B、CREATE ROLE manager; GRANT create table, create voew TO manager; GRANT manager ROLE TO BLACK, CLARK;C、GRANT manager ROLE TO BLACK, CLARK; GRANT create table, create voew TO BLACK CLARK; ***MISSING***

Which statements are true regarding the Query Result Cache? ()A、It can be set at the system, session, or table level.B、It is used only across statements in the same session.C、It can store the results from normal as well as flashback queries.D、It can store the results of queries based on normal, temporary, and dictionary tables.

You need to ensure that survey customers are automatically notified when their survey results are available. You must also ensure that customers can manage their own recipient lists. Which two actions should you perform?()A、Create a Subscription Management interface that will allow customers to modify their recipient lists.B、Create a custom Notification Services Content Formatter to send an e-mail message to customers when their survey results are available.C、Create a custom Notification Services Event Provider to send an e-mail message to customers when their survey results are available.D、Create a Notification Services custom delivery protocol to send an e-mail message to customers when their survey results are available.E、Create Notification Services Event rules to send an e-mail message to customers when their survey results are available.

单选题which address range efficiently summarizes the routing table of the addresses for router main?()A172.16.0.0/18B172.16.0.0/16C172.16.0.0/20D172.16.0.0/21

单选题You need to perform these tasks: 1. Create and assign a MANAGER role to Blake and Clark 2. Grant CREATE TABLE and CREATE VIEW privileges to Blake and Clark Which set of SQL statements achieves the desired results?()ACREATE ROLE manager; GRANT create table, create view TO manager; GRANT manager TO BLACK, CLARK;BCREATE ROLE manager; GRANT create table, create voew TO manager; GRANT manager ROLE TO BLACK, CLARK;CGRANT manager ROLE TO BLACK, CLARK; GRANT create table, create voew TO BLACK CLARK; ***MISSING***

单选题The committee kept the results of the survey()fearing a bad public reaction.Ain itselfBto itselfCby itselfDof itself

单选题The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query? SELECT * FROM HR;()AYou obtain the results retrieved from the public synonym HR created by the database administrator.BYou obtain the results retrieved from the HR table that belongs to your schema.CYou get an error message because you cannot retrieve from a table that has the same name as a public synonym.DYou obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a Cartesian product.EYou obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a FULL JOIN.

问答题Practice 2  You should spend about 20 minutes on this task.  The table below summarizes some data collected by a college bookshop for the month of February 1998.  Write a report describing the sales figures of various types of publications, based on the information shown in the table.  Write at least 150 words.

多选题Which statements are true regarding the Query Result Cache?()AIt can be set at the system, session, or table level.BIt is used only across statements in the same session.CIt can store the results from normal as well as flashback queries.DIt can store the results of queries based on normal,temporary,and dictionary tables.

单选题You are configuring the data source for an Oracle database. You will need to specify a test table for WebLogic to test the status of the database. Which option should you choose?()Aa table name which has 100s of recordsBa table name which has 10s of recordsCa table name which has empty recordsDa table name which has 1000s of recordsEnever use a table name

单选题You issued the following statement in your SQL*Plus session:   SQLALTER SESSION ENABLE RESUMABLE TIMEOUT 600;   Which operation is neither suspended nor resumed using the Automatic Resumable Allocation feature in your database?()A creating a table in your schema and you exceed your allocated space quota on the tablespaceB executing a long query that involves a sort operation and the statement runs out of temporary spaceC loading data into tables by using the SQL*Loader and the number of extents in the table reaches the maximum limitD creating a table in a dictionary-managed tablespace with an explicit MAXEXTENTS setting which results in an out of space error

单选题You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database named DB1 in the instance. In the Services schema, There is a table named Service.Table. The Services.Table has to be moved from the Sales schema to a new schema named Costs. In the options below, which Transact-SQL statement should you execute?()AALTER TABLE Service.Table SWITCH TO Costs.Table1; BALTER SCHEMA CostsTRANSFER Service.Table; CALTER USER Service WITH DEFAULT_SCHEMA = Costs; DALTER AUTHORIZATION ON Service.Table1 TO Costs;

单选题Which type of ships as below isn’t subject to Enhanced Survey Program (ESP)?()ANon-sea-going shipsBLiquefied gas carriersCBulk carriers, including ore carriersDEdible oil tankers

单选题A survey was recently given to all high school students in a certain town to measure the effect of environmental factors on attitudes and behavior, and the results indicated that students who play a minimum of two hours per day of violent video games are more likely to engage in violent behavior in school and at home. Therefore, playing violent video games encourages violence among teens.  Which of the following, if true, would most weaken the argument above?AThe same survey was conducted in a neighboring town with similar results.BPlaying violent video games keeps violent teenagers at home and prevents them from engaging in publicly aggressive behavior.CThe survey used a standard question format that did not allow students to produce responses that could not be interpreted incorrectly.DStudents who play violent video games often have a history of behavioral issues leading back to early childhood.EThe survey was given over a period of days to ensure that all students attending the high school would participate.