Notesale: Turn your study into money

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ELEMENTARY STATISTICS HOMEWORK,
QUIZZES, AND EXAMS
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Determine which of the four levels of measurement (nominal, ordinal,
interval, ratio) is most appropriate
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Determine which of the four levels of measurement (nominal, ordinal,
interval, ratio) is most appropriate
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In a survey, the responses of respondents are identified as 10 for a "yes", 20
for a "no", 30 for a "maybe", and 40 for anything else
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3
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Explain what is wrong with the given calculation
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Such data are not counts or measures of anything, so it makes no sense to
compute their average (mean)
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The average (mean) of the 529 blood lead levels is
25
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Identify the level of measurement of the data
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- CorreCt Answers -The
data are at the ordinal level of measurement
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Which of the following is associated with a parameter? - CorreCt Answers A parameter is a numerical measurement describing some characteristic of
a population
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Which of the following consists of discrete data? - CorreCt Answers -The
number of suitcases on a plane is a number representing a count
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Which level of measurement consists of categories only where data cannot
be arranged in an ordering scheme? - CorreCt Answers -The nominal level
of measurement is characterized by data that consist of names, labels, or

categories only
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State whether the data described below are discrete or continuous, and
explain why
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State whether the data described below are discrete or continuous, and
explain why
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State whether the data described below are discrete or continuous, and
explain why
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The number of loans a
bank makes each month nothing - CorreCt Answers -The data are discrete
because the data can only take on specific values
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Upper A sample of seniors is selected and it is found that 45% own a
vehicle
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In a test of a method of gender selection comma 674 couples used the
XSORT method and 537 of them had baby girls
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Determine which of the four levels of measurement (nominal, ordinal,
interval, ratio) is most appropriate
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Ages of children: 5, 6, 7, 8, and 9 - CorreCt Answers -Ratio

Determine which of the four levels of measurement (nominal, ordinal,
interval, ratio) is most appropriate for the data below
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Determine if the following statement represents a meaningful ratio, so the
ratio level of measurement applies
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Which of the following is associated with a parameter? - CorreCt Answers Data that were obtained from an entire population

Determine whether the description corresponds to an observational study
or an experiment
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One
group receives an experimental drug to fight cancer, the other a placebo
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- CorreCt Answers Experiment

Identify the type of sampling used (random, systematic, convenience,
stratified, or cluster sampling) in the situation described below
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- CorreCt Answers
-Random Sampling

Identify which type of sampling is used: random, systematic, convenience,
stratified, or cluster
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- CorreCt Answers -Cluster

Identify which of these types of sampling is used: random, systematic,
convenience, stratified, or cluster
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She then measures her mood at 2
randomly selected times during each part of the day
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Upper A market researcher has partitioned all residents of a certain region
into categories of young left parenthesis age 0 dash 30 right parenthesis
comma middle aged left parenthesis age 31 dash 60 right parenthesis
comma and senior left parenthesis over age 60 right parenthesis
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- CorreCt Answers -Stratified
Sampling

Determine whether the study is an experiment or an observational study,
and then identify a major problem with the study
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Based on random selections,
11,037 of them were treated with aspirin and the other 11,034 were given
placebos
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CorreCt Answers -This is an experiment because the researchers apply a
treatment to the individuals
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A study involved 22,071 male physicians
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The study was stopped early because it became clear that aspirin
reduced the risk of myocardial infarctions by a substantial amount
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The results apply only to male physicians

Identify the type of observational study (cross-sectional, retrospective, or
prospective) described below
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- CorreCt Answers -A retrospective study

Identify the type of observational study
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- CorreCt Answers -cross-sectional

Which sampling method subdivides the population into categories sharing
similar characteristics and then selects a sample from each subdivision? CorreCt Answers -Stratified
Determine whether the given value is a statistic or a parameter
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CorreCt Answers -Statistic because the value is a numerical measurement
describing a characteristic of a sample

Determine whether the data described below are qualitative or quantitative
and explain why
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) - CorreCt Answers -The data are qualitative because they don't
measure or count anything
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A survey found that 30 % of all respondents go to school
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Determine whether the given value is a statistic or a parameter
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CorreCt Answers -Statistic because the value is a numerical measurement
describing a characteristic of a sample
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If the areas of 20 states are added
and the sum is divided by 20, the result is 186 comma 979 square
kilometers
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CorreCt Answers -The result is a statistic because it describes some
characteristic of a sample
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When a car is randomly selected, it is found to have an engine with 4
cylinders
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Determine whether the value given below is from a discrete or continuous
data set
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5
kg
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Determine whether the value is from a discrete or continuous data set
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States in a region - CorreCt Answers -Nominal

Determine which of the four levels of measurement (nominal, ordinal,
interval, ratio) is most appropriate
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A study is conducted to measure children's growth rates without any
treatment applied to the children

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