Exam (elaborations)
Elementary Statistics (STATs 2023) Statistics STA 2023 Midterm Review (Tests 1, 2, 3)
- Course
- Elementary Statistics
- Institution
- St. Petersburg College
Statistics STA 2023 Midterm Review (Tests 1, 2, 3)
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Statistics STA 2023 Midterm Review (Tests 1, 2, 3)1. Which of the following correctly describes the survey.
rela- tionship between a parameter and a statistic?
2. A study was done to determine the average
commute time per week to and from class for an
SPC student attending a lecture class. For
convenience, a sample of 60 students was taken by
randomly selecting a lecture class on the Gibbs
campus (30 students), and also a lecture class on
the Clearwater campus (30 students). The students
selected for the sample were then asked where they
were commuting from, when, and how often. The
information was then entered into a GPS system in
order to obtain estimated commuting times. Identify
the population.
3. Which branch of statistics deals with the
organization and summarization of collected
information?
4. From past figures, it is predicted that 19% of the
regis- tered voters in California will vote in the June
primary. Identify whether the statement describes
inferential statistics or descriptive statistics.
5. The cost of a Statistics textbook. Classify the
variable as qualitative or quantitative.
6. Eye Color. Classify the variable as qualitative or
quan- titative.
7. A study where a drug was given to 23 patients and a
placebo to another group of 23 patients to determine
if the drug has an effect on a patient's illness. Decide
which method of data collection you would use to
collect data for the study. Specify either
observational study, experiment, simulation, or
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, Statistics STA 2023 Midterm Review (Tests 1, 2, 3)
A statistic is calcu- lated from sample data and is
gener- ally used to esti- mate a parameter. quantitati
All SPC students who attend lecture classes.
ve
qualitativ
e
descriptive inferential experime
nt
8.
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, Statistics STA 2023 Midterm Review (Tests 1, 2, 3)
A study where a political pollster wishes to observational
determine if his candidate is leading in the polls for study
an upcoming election. Decide which method of data
collection you would use to collect data for the
study. Specify either observational study,
experiment, or simulation.
9. 50 sophomores, 30 juniors and 20 seniors are random- stratified
ly selected from 500 sophomores, 300 juniors and
200 seniors at a certain high school. Identify the
sampling method used.
10. Every fifth person boarding a plane is searched Amer- ican
thor- oughly. Identify the sampling method used. males are
shown below.
11. At a local community college, five statistics classes Find the
are randomly selected out of 20 and all of the median
students from each class are interviewed. Identify score.
the sampling method used.
12. A community college student interviews everyone in
their statistics class to determine the percentage of
students that own a car. Identify the sampling
method used.
13. A fitness instructor measured the heart rates of the
participants in a yoga class at the conclusion of the
class. The data is summarized in the histogram be-
low. There were fifteen people who participated in
the class between the ages of 25 and 45. What
percent of the participants had a heart rate between
130 and 150 bpm?
14. The heights (in inches) of ten randomly chosen
Amer- ican males are shown below. Find the mean
score.
71 67 67 72 76 72 73 68 72 72
15. The heights (in inches) of ten randomly chosen
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