data were collected on 100 students regarding their class and major. the data are summarized in the following contingency table:

Data were collected on 100 students regarding their class and major. The data are summarized in the following contingency table:What is the probability of randomly selecting an undeclared student who is a senior？

A、0.43

B、0.30

C、0.73

D、0.14

Data were collected on 100 students regarding their class and major. The data are summarized in the following contingency table:The probability of randomly selecting a sophomore given he or she is an undeclared student is ()

A、19/100

B、19/29

C、19/30

D、30/100

A．How much does the data cost

B．For what purposes were the data collected

C．What language is used in the host country

D．Was the data available on the Internet

A、What procedures does the experiment design？

B、Can the experiment design generate valid findings？

C、Where and when was the study carried out？

D、How the data were collected and analyzed？

A．a pie chart

B．a Pareto chart

C．a side-by-side bar chart

D．a histogram

Which of the following is NOT true about the maps of sea ice movements？

A．They are the research results of Holland and Kwok.

B．They were made in a lab located in California.

C．The data for those maps have been collected over 19 years.

D．They show the temporary changes in sea ice drift.

A．It indicates the locations of England"s major canals.

B．It became most valuable when the steam locomotive made rail travel possible.

C．The data for the map were collected during Smith"s work on canals.

D．It is no longer regarded as a geological masterpiece.

Which of the following is NOT true about the maps of sea ice movements？

A．They arc the research results of Holland and Kwok.

B．They were made in a lab located in California.

C．The data for those maps have been collected over 19 years.

D．They show the temporary changes in sea ice drift.

A．There are too few sites that have been excavated and very little data collected about them.

B．The archeologists from earlier periods were not careful, and many artifacts were broken.

C．It is confusing because stones from early sites were used to build later structures.

D．Because it is very difficult to date the concrete that was used in construction during early periods.

A．year in which data on occupations began to be analyzed by gender

B．year in which hspecific information began to be collected on individuals in addition to the head of the household

C．year in which overlap between women employed outside the home and women keeping hosue was first calculated

D．way in which the 1890 census measured women’s income levels and educational backgrounds

E．way in which household members were counted in the 1840 census