Algebra 2 - Unit 1A review

First-year students at a certain large university are required to live on campus in 1 of the 24 available residence halls. After their first year, students have the option to live away from campus, but many choose to continue living in the residence halls. Estella oversees 12 of these residence halls. Her department surveyed a large simple random sample of first-year students who live in those 12 residence halls about their overall satisfaction with campus living.

Estella can safely generalize the results of the survey to which population?

• Only those students who were surveyed.

• All first-year students, but only those who live in these 12 residence halls.

• All students (first-year and not), but only those who live in these 12 residence halls.

• All first-year students at the entire university, but not students beyond their first-year.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

• to randomly ask 8th grade students who went on a field trip last year
• to randomly choose some 7th grade students to select a location
• to ask all 7th grade teachers and administrators for a location
• to ask the student council to choose a location

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Disneyland often surveys its guests as they exit a restaurant during their visit. The surveyor stands at the restaurant exit, counts the number of people leaving, and surveys every 25th guest.
This is a form of:

• Simple Random Sample
• Stratified Random Sample
• Voluntary Response
• Systematic Random Sampling

Tags

CCSS.HSS.IC.B.3

To randomly select 25 basketball players from the 300 players in the NBA, I would: 

• Number the players from 01-25, read 3 digits at a time from a random table, discarding repeats and numbers over 25, and then stop when I reach 25.
• Number the players from 0-299, read 2 digits at a time from a random table, discarding repeats and numbers over 299, and stop when I reach 25.
• Number the players from 01-299, read 2 digits at a time from a random table, discarding repeats and numbers over 300, and stop when I reach 25.
• Number the players from 001-300, read 3 digits at a time from a random table, discarding repeats, 000 and numbers over 300, and stop when I reach 25.

Tags

CCSS.7.SP.A.2

The most important advantage of experiments over observational studies is that

• A) experiments are usually easier to carry out
• B)Experiments can usually give better evidence of causation
• C) Confounding cannot happen in experiments
• D) Observational studies cannot use random samples

Tags

CCSS.HSS.IC.B.3

A local news program decides to conduct a poll to see how their viewers feel about their programming format. At the end of each program during one week they ask viewers to call in and express their opinions. The station gives one number to dial if you like the new format, and another to dial if you do not like it. Which of the following is a correct characterization of this sampling approach?

• This sampling approach will be biased because people might dial the number incorrectly, and therefore not everyone will be correctly represented.

• This sampling approach will be biased because the people who call in will be those who have stronger feelings about the new format, and therefore the sample will not be representative of the population.

• This sampling approach will be unbiased because people can call in with either opinion, and therefore the sample will be representative of the population.

• This sampling approach will be unbiased because the station doesn't know who will call in, making it a random sample.

• It is impossible to tell whether this sampling approach will be biased or not because the station cannot predict who will call in.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Which of the following best describes the shape of the distribution?

• SKEWED LEFT
• SKEWED RIGHT
• UNIFORM
• SYMMETRIC

Which of the following best describes the shape of the distribution?

• SKEWED LEFT
• SKEWED RIGHT
• UNIFORM
• SYMMETRIC

A survey should always be ____ and ____.

• random and biased
• random and unbiased

Tags

CCSS.HSS.IC.B.3

At an assembly 7 out of 10 students who entered the gym were carrying a backpack. Based on this information, if 700 students were at the assembly, how many students could be expected to be carrying a backpack?

• 49

• 490

• 210

• 421

Tags

CCSS.7.RP.A.3