INTRO TO STATISTICS UNIT 1
PRACTICE MILESTONE 1
the type of experimet design where the assignment of
experimental units to treatmet and control group ois random is
called a(n) - CORRECT ANSWER-completely randomized
design
which of the following definitions corresponds with an
observational study? - CORRECT ANSWER-measuring
variables of interest but not attempting to influence responses/
which of these random samples qualifies as a representative
sample to find out what parents think about the levels of college
tuition fees in the state? - CORRECT ANSWER-50 parents of
college students from the state.
in a study to assess the riskof lung cancer with the number of
cigarettes smoked per week, researchers randomly selected
subjects who smoked, and began collecting data on the
number of cigaretted they smoked per week, making not of
which subjects later developed lung cancer.
this is a(n) _______ statistical study. - CORRECT ANSWER-
prospective
which of the following describes cluster sampling? - CORRECT
ANSWER-divide the population into groups, and then randomly
select some groups. Choose all the members within the
selected groups to be part of the sample.
, In experiments, a(n) _________ variable is controlled to explain
a cause and effect relationship. - CORRECT ANSWER-
explanatory
in measuring the mass of a 50-gram weight in a science class,
some students use a poorly calibrated balance and obtain a
value of 55.5 grams.
the relative error in their calculation is____. - CORRECT
ANSWER-11%
A survey was conducted to find the number of hours that
people spend on their phones in a day. A group of 300 people
in a shopping mall were asked about how long they spend on
their phone and It was found that 42 people spend at least two
hours on their phone in a day.
Which of these does not represent inferential statistics? -
CORRECT ANSWER-14% of the people surveyed in the
shopping mall spend at least two hours on their phone in a day.
which of the following describes simple random sampling? -
CORRECT ANSWER-choose a sample so that every member
of the population has an equal chance of being selected for the
sample.
consider the following dart board and darts.
using the words "accuracy" and "precision", how would the
arrangement of darts be best classified if the thrower was
aiming for the bullseye in the center? - CORRECT ANSWER-
low accuracy and high precision
data that was gathered for a past study and re-used to answer
questions in a present study is called _____ data. - CORRECT
ANSWER-available
The owner of an ice cream shop would like to determine
statistically which age groups (13-21, 22-35, 36-50, and 50 and
PRACTICE MILESTONE 1
the type of experimet design where the assignment of
experimental units to treatmet and control group ois random is
called a(n) - CORRECT ANSWER-completely randomized
design
which of the following definitions corresponds with an
observational study? - CORRECT ANSWER-measuring
variables of interest but not attempting to influence responses/
which of these random samples qualifies as a representative
sample to find out what parents think about the levels of college
tuition fees in the state? - CORRECT ANSWER-50 parents of
college students from the state.
in a study to assess the riskof lung cancer with the number of
cigarettes smoked per week, researchers randomly selected
subjects who smoked, and began collecting data on the
number of cigaretted they smoked per week, making not of
which subjects later developed lung cancer.
this is a(n) _______ statistical study. - CORRECT ANSWER-
prospective
which of the following describes cluster sampling? - CORRECT
ANSWER-divide the population into groups, and then randomly
select some groups. Choose all the members within the
selected groups to be part of the sample.
, In experiments, a(n) _________ variable is controlled to explain
a cause and effect relationship. - CORRECT ANSWER-
explanatory
in measuring the mass of a 50-gram weight in a science class,
some students use a poorly calibrated balance and obtain a
value of 55.5 grams.
the relative error in their calculation is____. - CORRECT
ANSWER-11%
A survey was conducted to find the number of hours that
people spend on their phones in a day. A group of 300 people
in a shopping mall were asked about how long they spend on
their phone and It was found that 42 people spend at least two
hours on their phone in a day.
Which of these does not represent inferential statistics? -
CORRECT ANSWER-14% of the people surveyed in the
shopping mall spend at least two hours on their phone in a day.
which of the following describes simple random sampling? -
CORRECT ANSWER-choose a sample so that every member
of the population has an equal chance of being selected for the
sample.
consider the following dart board and darts.
using the words "accuracy" and "precision", how would the
arrangement of darts be best classified if the thrower was
aiming for the bullseye in the center? - CORRECT ANSWER-
low accuracy and high precision
data that was gathered for a past study and re-used to answer
questions in a present study is called _____ data. - CORRECT
ANSWER-available
The owner of an ice cream shop would like to determine
statistically which age groups (13-21, 22-35, 36-50, and 50 and
