Complete the table.
(Round to two decimal places as needed.)
You randomly survey students in your school about whether they have a pet. You display your results in the two-way table. How many female students took the survey?
You randomly survey students in your school. You ask whether they have jobs. You display your results in the two-way table. How many male students do not have a job?
A group of children and adults were polled about whether they watch a particular TV show. The survey results, showing the joint relative frequencies and marginal relative frequencies, are shown in the two-way table.
What is the value of x?
Use the two-way table of data from another student survey to answer the following question.
Find the conditional relative frequency that a student likes to lift weights, given that the student likes aerobics.
Raul is conducting a survey for the school news blog. He surveys 200 senior-class students and finds that 78 students have access to a car on weekends, 54 students have regular chores assigned at home, and 80 students neither have access to a car, nor have regular chores to do. Raul is having a hard time putting the data into a two-way table. Car No car Chores No chores a. Copy and complete the two-way table to help Raul figure out the number of students in each situation. b. Two-way tables often include row and column totals. Your two-way table should now have row and column totals. Are these students' car privileges and their participation in regular chores related? Describe your response in light of the issue.
When performing a test of independent in a contingency table with r rows and c columns, determine the upper-tail critical value of the test statistic in each of the following circumstances:
1. α=0.05, r=4 rows, c=5 columns
2. α=0.01, r=4 rows, c=5 columns
3. α=0.01, r=4 rows, c=6 columns
4. α=0.01, r=3 rows, c=6 columns
5. α=0.01, r=6 rows, c=3 columns
On its first journey, the Titanic was struck by an iceberg in 1912 and sank. Some passengers used the lifeboats to leave the ship, but many perished. By class of travel, the following two-way table lists the adult passengers who perished and those who survived.
Let's say we choose at random one of the Titanic's adult passengers. Give event D the definition of receiving a death, and event F the definition of receiving a first-class passenger. Find P (not a passenger in first class or survived).
Answer the following question using the two-way table below. Round your answer to the nearest whole percentage point. There are 300 seniors at Bellmere Senior High School who are enrolled in elective science classes as shown below.
What is the probability that a senior student chosen at random is enrolled in physics given that student is female?
Gastric freezing was once a recommended treatment for ulcers in the upper intestine. One experiment compared 82 subjects randomly assigned to gastric freezing and 78 subjects randomly assigned to receive a placebo. The two-way table shows the results of the experiment. Is there convincing evidence of an association between treatment and outcome for subjects like these?