Introduction To Statistics Unit 1: Milestone 1 Questions And Answers 100% Guaranteed Success.
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Introduction to Statistics Unit 1: Milestone 1
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Introduction To Statistics Unit 1: Milestone 1
Introduction To Statistics Unit 1: Milestone 1 Questions And Answers 100% Guaranteed Success.
Which of these statements best defines a stratified random sample? - correct answer. It is a sample where the population is first broken into groups and then elements are randomly select...
Introduction To Statistics Unit 1: Milestone 1
Questions And Answers 100% Guaranteed
Success.
Which of these statements best defines a stratified random sample? - correct answer.
It is a sample where the population is first broken into groups and then elements are
randomly selected, in proportion, from each group.
Which of the following data types will be continuous? - correct answer. The amount
of snow that fell last night.
A study in which results are measured without intervention from the researcher is
called... - correct answer. Observational study.
Which of the following best classifies the arrangement of bean bags? - correct answer.
Low accuracy and low precision.
Mike wants to find out the approximate income for professors in Michigan. He decides
to randomly select 50 professors who work for a college or university in Michigan and
obtain their salaries.
What are the sample and the population of Mike's study? - correct answer. The 50
professors that Mike interviews are his sample, and all of the professors who work in
Michigan are the population.
James conducts a survey to study the relationship between cell phone use and grades
earned during the fall semester. James suspects that there might be a lot of other
factors that affect grades besides cell phones.
, Which of the following could be a confounding variable in James's study? - correct
answer. Time spent studying.
Cindy measured and recorded the temperature of a liquid for an experiment. She used
a poorly calibrated thermometer and noted the temperature as 100.5 degrees
Fahrenheit. The actual temperature of the liquid was 95 degrees Fahrenheit.
The percent error in her calculation is... - correct answer. 5.79%
On a candy production line, 3% of bags are overfilled. An employee randomly selects
100 bags and finds that 5% are overfilled. A second employee takes another random
sample of 250 bags and finds that 2% are overfilled.
Which of the following explains why there is a difference between the two percentages?
- correct answer. Random error; the numbers were different due to variability
inherent in sampling.
Rob sent an email survey to 2,000 cell phone owners asking about their satisfaction
with their current plan. Only 256 people returned the survey and they were
predominately 18-24 years old.
Which of the following statements is true? - correct answer. The survey likely has
bias because the people who could not answer differ from those who did answer.
Regan wants to study how reading on a computer affects comprehension among
elementary school students. Regan thinks that girls and boys might differ and he also
suspects that grade level will affect the results. He decides to create a male and female
group for each grade. Within each group, he randomly assigns half of the students to
reads an article on paper and half of the students to read the article on a computer.
Which type of experiment design does this situation illustrate? - correct answer.
Randomized Block.
A student group on a college campus wanted to create a survey about parking
availability on campus. The student group randomly selected 300 students to take the
survey. One of the questions read, "Many students believe the lack of availability
parking is a major problem. Do you agree or disagree?" Or the 300 students that took
the survey, 285 surveys were returned.
This survey will most likely suffer from which of the following types of bias? - correct
answer. Response Bias
A poll was conducted two weeks before an election and showed that the incumbent
would win with 54% of the vote and a margin of error of 3%.
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