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Terms in this set (72)
Uncertainty regarding conclusions about a population can be eliminated if you
Obtain data from all members of the population
A prospective graduate student may be interested in gender balance at the university she will attend. Data on how many males and females attend the institution are examples of
Which descriptive statistics we take a sample or a small subset of a larger set of data. We then use this sample to draw inferences about the population as a whole
When participants who arrive for a research study are put into treatment groups on the basis of chance
Random assignment had occurred
A random sample is one
In which every unit of a particular size has an equal probability of being selected
The word "data" refers to the information that has been collected from an experiment,a survey, an historical record,etc
The study of statistics involves math and relies upon calculations of numbers. But it also relies heavily on how the numbers are chosen and how statistics are interpreted
We want to find the average GPA of a student at our college. Our college has 4,834 students, and you select 300 students at random and ask them about their GPAS. The population is __________ and the sample is ________.
4,834 and 300
The newspaper reports that higher rates of drowning and ice cream consumption correspond. Does that mean that eating ice cream can put you at risk of drowning? What might be the reason behind this phenomenon?
In summer both ice cream consumption and swimming increases
All of the answers are correct
Using a random sample is to accept some uncertainty about the conclusions
Which type of sampling is the most straight forward
A biased sample is one that
Will likely have certain groups from the population over-represented or under-represented due only to systematic sampling factors
______________ refers to a range of techniques and produces for analyzing, interpreting, displaying, and making decisions based on data.
A sample of only those students seated in the front row of class would be an unbiased sample
___ are properties or characteristics of some event, object, or person that can take on different values or amounts.
It is important of measurements in research to be accurate or valid so that
The method you are using measures what you think are measuring
_________is a process to discover new knowledge.
Which of the following is qualitative variable?
A discrete variable is
One that can only take on a finite number of values
A(n) ________ study in which a treatment, procedure, or program is intentionally introduced and a result or outcome is observed
Can blueberries slow down aging?..... what is/are the dependent variables?
Both memory and motor tests
A continuous variable is
One that can take on a finite number of values
A variable the experimenter maniuplates is
No matter what topic is being studied, the value of research depends on how well it is designed and done
Why do you need to pay attention to the details outlined in the study protocol?
To follow my responsibilities adequately
Why is it important for research staff to maintain the integrity of the research protocol?
To ensure the study is conducted correctly
In an experiment on the effect of crossword puzzles on memory, the independent variable is
Number of hours spent doing crossword puzzles
A ____ study is one in which information is collected without changing the environment
Can blueberries slow down aging? What is the independent variable?
In an experiment on the effect of sleep on memory, the independent variable is
Number of hours of sleep
Research can be done with human beings, animals, plants, other organisms and inorganic matter. When research is done with human beings and animals, it must follow specific rules about the treatment of humans and animals that have been created by the us federal government. This ensures that humans and animals are treated with dignity and respect, and that the research causes minimal harm
Which of the following is a quantitative variable
Average daily temperature
The variable the experiment measured is
Low density lipoprotein...
After the blood test, the nurse wants to know the mode of LDL scores which is ____.
________ is the most commonly used measure of centers tendency,
The ______ is VERY sensitive to extreme scores that can skew or distort findings
A researcher collected BMI of students trained to become dietitians. The BMI for the ten students listed below: 18.4, 19.0, 21.4, 25.0 23.5, 48.6, 23.6, 24.0, 18.1, 26.0
The researcher wants to know the median BMI. The correct answers is
10 students participate in statistics quiz 2, their grade are: 98,85,,89,73,76,85,87,92,95,56
The professor wants to know the median of the grades. The correct answer is
Use______ when you only want to describe the sample or summarize information about the sample.
You are interested in studying college students. There are 4,834 enrolled at the college. You survey 300 students. The population would be ______ and the sample would be ______.
4,834 and 300
The _____ is the mosey frequently occurring values
In the following data set what number is the outlier? 6, 24, 27,32,34,22
Measures of central tendency- way to describe the center or average of a data set. The goal of central tendency is to find the single score that is most typical or most representative of the entire group
You can only have one mode
Which of the following are measures of central tendency?
Mean mode and median
______ are extreme, or a typical data values that are notably diffrently from the rest of the data
The _____ is the middle number in a data set
Having two modes is called____, while having more that two modes is called_____.
The _______ scale of measurement is the most informative scale. It it an interval scale with the additional property that it's zero position indicates the absence of the quantity being measured
Amount of money is measured on what type of scale
Identify the scale of measurement for the following: temperature measured in centigrade
______ includes names or categorized, the order is meaningful and intervals have the same interpretation
____ include names or categories. Not in any order
With _______ scare, you can't assume the difference between differences between adjacent scales values are equal
If a distribution is left skewed its mean is usually ____ its median
Example of things that closely follow a normal distribution are
Both heights of people and blood pressure
A likely scale is an example of ______ scale of measurement
A distribution is said to be _____ when the tail on the right side of the distribution is longer that the left said
Positively or right skewed
When a distribution is _____ the mode, median and mean are the same all in the middle of the distribution
___is always at the 50th percentile
There is no universally accepted definition of a percentile
A distribution is said to be_______ when the tail on the left side of the distribution is longer that the right side
Negatively or left skewed
56 th percentile means that the score received is ______
At or above 56% of all other scores in the distribution
What is the best measure of central tendency for the following set of numbers
Identify the scale of measurement for the following military hierarchy: lieutenant captiain major
_______ includes names or catorgorize and the order is meaningful
____ contains the qualities of the nominal,, ordinal, and interval scales with the addition of an absolute zero point
A right skewed distribution is also called a _____ distribution
Pie charts work best for displaying data for ____ categories
3 to 7
Although bar charts are often used to show means this text recommends that____ be used instead
Bar charts are particularly useful for showing change over time
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