MATH 1401 MIDTERM EXAM 2025 QUESTIONS AND ANSWERS

MATH 1401 MIDTERM EXAM 2025 QUESTIONS
AND ANSWERS


A survey of 1500 American households found that 33% of the households own a
computer. Identify the population.



a). All American households owning a computer

b). The 1500 American households surveyed

c). The 33% of the 1500 households sampled that own a computer

d). 33% of American households

e). The collection of all American households

e). The collection of all American households



The following statement refers to which aspect of a statistical study: "From past
figures, it is predicted that 47% of the registered voters in Virginia will vote in the
June primary"?



a). Description

b). Inference

c). Design

b). Inference

, Determine whether the summary measure is better described as a parameter or a
statistic:



The average GPA of a university's graduating class.



a). Statistic

b). Parameter

b). Parameter




Data

The information we gather with experiments and surveys.




The three main components for answering a statistical question:

1). Design

2). Description

3). Inference




Design

, How to run the experiment or how to sample people for the survey to ensure
rustworthy results.




Description

Summaraize the raw data and present it in a useful format (e.g., median, average,
roportions, charts, or graphs).




Inference

Making decisions or predictions based on the data.




Subjects

The entities that we measure in a study. Subjects could be individuals, plants,
schools, or countries.




Population

The total set of subject sin which we are interested.




Sample

Subset of the population for whom we have data.