question archive 1) A political scientist surveys 35 of the current 130 representatives in a state's legislature
1) A political scientist surveys 35 of the current 130 representatives in a state's legislature
Subject:MathPrice: Bought3
1) A political scientist surveys 35 of the current 130 representatives in a state's legislature.
What is the size of the sample:
What is the size of the population:
2 The city of Raleigh has 7200 registered voters. There are two candidates for city council in an upcoming election: Brown and Feliz. The day before the election, a telephone poll of 250 randomly selected registered voters was conducted. 85 said they'd vote for Brown, 149 said they'd vote for Feliz, and 16 were undecided.
Describe the population actually represented by this survey.
- All citizens of Raleigh
- All registered voters in Raleigh
- All registered voters with telephones in Raleigh
- The 250 voters surveyed
- The 85 voters who said they'd vote for Brown
- None of the above
3 The city of Raleigh has 6900 registered voters. There are two candidates for city council in an upcoming election: Brown and Feliz. The day before the election, a telephone poll of 500 randomly selected registered voters was conducted. 281 said they'd vote for Brown, 174 said they'd vote for Feliz, and 45 were undecided.
Give the sample statistic for the proportion of voters surveyed who said they'd vote for Brown. Note: The proportion should be a fraction or decimal, not a percent.
This sample statistic suggests that we might expect of the 6900 registered voters to vote for Brown.
4 Determine whether the value 70% is a parameter or statistic:
A sample of men reveals 70% took calculus
- Parameter
- Statistic
5 In a study, the data you collect is Habits on a Always/Sometimes/Never scale.
This data is:
- Quantitative
- Qualitative (Categorical)
- 6 Which source of bias is most relevant to the following situation:
A research study funded by an avowed atheist finds that over 95% of college biology professors refuse to teach creationism.
- self-interest study
- voluntary response bias
- nonresponse bias or missing data
- perceived lack of anonymity
- loaded or leading question
7 To determine how American college students feel about commuting, 100 students at a private university were randomly chosen by selecting 50 men and 50 women to participate. They were asked how far they commute each day (in minutes) to campus.
The results of this survey are unreliable primarily because of
- sampling bias
- voluntary response bias
- response bias
- the absence of a control group
- None of the above
8 A team of researchers is testing the effectiveness of a new HPV vaccine. They randomly divide the subjects into two groups.
Group 1 receives new HPV vaccine, and Group 2 receives existing HPV vaccine.
The patients were told which group they were in.
Which is the treatment group?
- Group 1
- Group 2
- Neither group
Which best describes this research?
- Experiment
- Placebo Controlled Experiment
- Survey
- Controlled Experiment
9 As part of a statistics project, a teacher brings a bag of marbles containing 500 white marbles and 400 red marbles. She tells the students the bag contains 900 total marbles, and asks her students to determine how many red marbles are in the bag without counting them.
A student randomly draws 200 marbles from the bag. Of the 200 marbles, 90 are red.
The data collection method can best be described as
- Survey
- Census
- Clinical study
- Controlled study
The target population consists of
- The 200 marbles drawn by the student
- The 90 red marbles drawn by the student
- The 900 marbles in the bag
- The 400 red marbles in the bag
- None of the above
The sample consists of
- The 200 marbles drawn by the student
- The 90 red marbles drawn by the student
- The 900 marbles in the bag
- The 400 red marbles in the bag
- None of the above
Based on the sample, the student would estimate that marbles in the bag were red.
10 A researcher interested in Springfield citizens' shopping habits surveys a randomly selected group of 200 Walmart shoppers. 76% of those surveyed indicated that price was more important to them than where an item was produced. The researcher concluded that "about three quarters of the people in Springfield are more concerned with cost than where an item is made."
This conclusion might be invalid because:
- 76% is not exactly three quarters.
- the sample is not representative of the population.
- there was no control group.
- the size of the sample is too small.
- None of the above
