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WorksheetsMidterm Exam in Statistics and Probability (Feb 22, 2021)
Total questions: 50
Worksheet time: 25mins
It is the science of collecting, organizing, analyzing and interpreting data in order to make decisions.
Data
Statistics
Statistic
Population
What is data?
A numerical description of a population characteristic.
The science of collecting, organizing, analyzing, and interpreting data in order to make decisions.
Information coming from observations, counts, measurements or responses.
A numerical description of a sample characteristic.
Complete the definition:
A _________ consists of all subjects (human or otherwise) that are being studied
Statistics
Population
Sample
Parameter
Complete the definition:
A _______ is a subset of a population
Parameter
Sample
Statistic
Statistics
It is a numerical description of a population characteristic.
Statistic
Statistics
Parameter
Data
It is a numerical description of a sample characteristic
Sample
Parameter
Statistic
Statistics
Branches of Statistics
Link the branches of statistics to their definition.
a) Descriptive
b) Inferential
a) involves the organization, summarization, and display of variables.
b) involves the invention, summarization, and display of data.
a) involves using a sample to draw conclusions about a population.
b) involves the organization, summarization, and display of data
a) involves the organization, summarization, and display of data.
b) involves using a sample to draw conclusions about a population.
A survey conducted among 1017 men and women by Opinion Research Corporation International found that 76% of women and 60% of men had had a physical examination within the previous year.
Identify the descriptive aspect of the survey.
A survey.
It is estimated that 76% of women and 60% of men in the country have had a physical examination within the previous year.
...among 1017 men and women, it was found that 76% of women and 60% of men had had a physical examination withing the previous year.
A survey conducted among 1017 men and women by Opinion Research Corporation International found that 76% of women and 60% of men had had a physical examination within the previous year.
Identify the inferential aspect of the survey.
...among 1017 men and women, it was found that 76% of women and 60% of men had had a physical examination withing the previous year.
It is estimated that 76% of women and 60% of men in the country have had a physical examination within the previous year.
A survey.
What is Quantitative Data?
Consist of attributes, labels, or nonnumerical entries.
Consist of a subset of the population.
Consist of numerical measurements or counts.
What is Qualitative Data?
Consist of attributes, labels, or nonnumerical entries.
Consist of a subset of the population.
Consist of numerical measurements or counts.
The number of oranges in a bag.
Discrete
Continuous
Graph of the growth of a plant for the next 30 days.
Discrete
Continuous
The time it takes for a light bulb to burn out.
Discrete
Continuous
A student measures the weight of every individual in his batch. This means that he will get...
Sample
Variable
Statistic
Parameter
What are the characteristics of a parameter?
Population is complete and fixed.
Population is not fixed
Population is not complete
Population is not relevant
The correct steps of statistical problem solving is...
Identify problem > present data > gather data > analyze data > reach a decision
Identify problem > gather data > analyze data > present data > reach a decision
Identify problem > gather data > present data > analyze data > reach a decision
Identify problem > present data > analyze data > gather data > reach a decision
Inferential vs descriptive statistics?
Making statements for the population based on samples
Descriptive
Inferential
Inferential vs descriptive statistics?
Stating a set of data's mean, median, mode, standard deviation and etc
Descriptive
Inferential
Inferential vs descriptive statistics?
Making generalization
Descriptive
Inferential
Inferential vs descriptive statistics?
Uses the data to provide descriptions of the population, either through numerical calculations or graphs or tables.
Descriptive
Inferential
Inferential vs descriptive statistics?
Draws educated conclusions about a population that is likely too large to sample completely
Descriptive
Inferential
What is a controlled variable in a science experiment/investigation?
The part of the experiment that we measure.
The part of the experiment that we keep the same between trials.
The part of the experiment that we manipulate or change.
When we make a prediction about what we think the results will show.
What is a dependent variable in a science experiment/investigation?
The part of the experiment that we measure.
The part of the experiment that we keep the same between trials.
The part of the experiment that we manipulate or change.
When we make a prediction about what we think the results will show.
What is the first thing you should do before starting to collect data?
Decide what the purpose of the data collection is.
Collect personal information about respondents.
Write your questions.
Contact potential participants.
The things that are kept the same to ensure the results are due to the experiment is called..
Control
Controlled variable
Independent Variable
Dependent Variable
Surveys can generate
Qualitative data
Quantitative data
Objective data
All of the above
Data collection is the process of...
gathering and measuring newspapers on variables of interest
gathering and measuring information on variables of interest
gathering and measuring books on variables of interest
gathering and measuring diaries on variables of interest
Which one is a strength of observations
enables a researcher to look afresh at everyday behavior that otherwise might be taken for granted, expected or go unnoticed
has difficulties with maintaining high levels of anonymity
can provide a bias outcomes due to confirmation bias of the person/s observing and their AR hypothesis
can manipulate the situation or subjects
Information gained using the 5 senses
inference
qualitative
observation
quantitative
Determining if students using a calculator on a math final exam score better than students who do not use a calculator
Census
Experiment
Sample Survey
Observational Study
Choosing people at random at the supermarket and asking them to taste two brands of orange juice to determine which brand they prefer.
Census
Experiment
Sample Survey
Observational Study
Asking an open ended question in an interview generates
quantitative data
qualitative data
discrete data
continuous data
What is the hypothesis?
The part of the investigation where we plan how to keep researchers and the organisms we study free of harm.
A statement of the aim of the experiment. What we hope to find out.
The part of the experiment that we manipulate or change.
When we make a prediction about what we think the results of an investigation will show.
What is in the ethics section of an investigation/experiment plan?
The part of the investigation where we plan how to keep researchers and the organisms we study free of harm.
A statement of the aim of the experiment. What we hope to find out.
The part of the experiment that we manipulate or change.
When we make a prediction about what we think the results of an investigation will show.
Primary data in a science context is...
Data collected for a purpose.
Data that you have collected yourself.
Data sourced on the internet.
Data collected by a professional researcher.
A ___ is a large group that includes everything being studied.
Sample
Census
Population
Stratified Sampling Method
Which scale is the simplest form of measurement?
Nominal
Ordinal
Interval
Ratio
An ordinal scale is used to rank order people, objects, or characteristics.
True
False
Interview every 10th student who enters the school in the morning. Determine the sampling method used.
simple random sampling
systematic sampling
cluster sampling
convenience sampling
Mariana wanted to know students' opinion on the new schedule at school. She survey's the first 30 students who come into their classroom. Determine the sampling method that she used.
Convenience Sampling
Simple Random Sampling
Judgemental Sampling
Systematic Random Sampling
Aristocrat Restaurant often surveys its guests as they exit a during their visit. The surveyor stands at the restaurant exit, counts the number of people leaving, and surveys every 25th guest.
This is a form of:
Simple Random Sample
Voluntary Response
Stratified Random Sample
Systematic Random Sampling
A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She picks the student in every 5th seat.
Simple Random
Systematic
convenience
voluntary response
An independent research company wants to go door to door to survey people in the city. The company decides to number all blocks within the city limit, randomly choose 1 block and survey all households on that block.
This is an example of:
Simple Random Sample
Stratified Random Sample
Systematic Random Sampling
Cluster Random Sample
A teacher wants to know how well her students are doing on a topic. She randomly picks one class to survey.
Cluster
Stratified
Systematic
Simple Random
A teacher splits her classes up by period. She then randomly picks 3 students from each period to do a survey.
Stratified Sampling
Cluster Sampling
Systematic Sampling
Quota Sampling
The number of hours you spent in social media each day during the past week
Nominal
Interval
Ordinal
Ratio
Your friend's score on an intelligence test
Nominal
Interval
Ordinal
Ratio
The temperatures in cities throughout the country that are listed in most newspapers.
Nominal
Ordinal
Interval
Ratio
Which level of measurement would involve participants being assigned labels to put them into categories?
Nominal data
Ordinal data
Interval data
Ratio data
