The range
is the difference between the highest and lowest scores in a distribution. It is calculated by subtracting the lowest score from the highest score.
What correlation between two variables means that as scores on one variable increases the scores on another variable also increase?
Positive correlation is a relationship between two variables in which both variables move in tandem—that is, in the same direction. A positive correlation exists when one variable decreases as the other variable
decreases, or
one variable increases while the other increases.
Is descriptive statistics is used in order to analyze the relationship between variables?
Descriptive statistics is used in order to analyze the relationship between variables. … Inferential statistics allows a researcher to make inferences about a specific population based on data taken from a sample.
What are the two major division of statistics?
The two major areas of statistics are known as
descriptive statistics
, which describes the properties of sample and population data, and inferential statistics, which uses those properties to test hypotheses and draw conclusions. Some common statistical tools and procedures include the following: Descriptive.
Which statistic describes the most frequently occurring score in a set of scores?
The median is the middle score in a set of given numbers.
The mode
is the most frequently occurring score in a set of given numbers.
What is a weak positive correlation?
A weak positive correlation would indicate
that while both variables tend to go up in response to one another, the relationship is not very strong
. A strong negative correlation, on the other hand, would indicate a strong connection between the two variables, but that one goes up whenever the other one goes down.
What is correlation distinguish between positive and negative correlation?
A positive correlation means that the variables move in the same direction. Put another way, it means that as one variable increases so does the other, and conversely, when one variable decreases so does the other. A
negative correlation means that the variables move in opposite directions
.
How is the range determined when analyzing a data set?
The range is the difference between the highest and lowest values of a data set, generally found by
subtracting the lowest from the highest value found
.
When statistics analyze sample data in order to draw conclusions about the characteristics of a population?
The procedure to analyze samples to conclude about population is
statistical inference
.
What is used to analyze sample data in order to make conclusions about a population quizlet?
Inferential statistics
allows a researcher to make inferences about a specific population based on data taken from a sample. Descriptive statistics is used in order to analyze the relationship between variables.
What is difference between inferential and descriptive statistics?
But what’s the difference between them? In a nutshell, descriptive statistics focus on describing the visible characteristics of a dataset (a population or sample). Meanwhile, inferential statistics
focus on making predictions or generalizations about a larger dataset
, based on a sample of those data.
What kind of data can be measured counted or calculated?
Quantitative data
is numerical. It’s used to define information that can be counted. Some examples of quantitative data include distance, speed, height, length and weight. It’s easy to remember the difference between qualitative and quantitative data, as one refers to qualities, and the other refers to quantities.
Which of the following refers to the branch of statistics consists of higher degree of analysis interpretation and inferences?
Inferential statistics
, as the name suggests, involves drawing the right conclusions from the statistical analysis that has been performed using descriptive statistics. In the end, it is the inferences that make studies important and this aspect is dealt with in inferential statistics.
What is the difference between the highest and lowest scores in a distribution?
The range
is the difference between the highest score and the lowest score in the distribution.
What do you call the most frequently occurring observation in a data set?
In statistics,
the mode
is the most commonly observed value in a set of data. For the normal distribution, the mode is also the same value as the mean and median.
Which measure of central tendency is affected by every score in the distribution?
However, in this situation,
the mean
is widely preferred as the best measure of central tendency because it is the measure that includes all the values in the data set for its calculation, and any change in any of the scores will affect the value of the mean.
What is the weakest correlation?
The weakest linear relationship is indicated by
a correlation coefficient equal to 0
. A positive correlation means that if one variable gets bigger, the other variable tends to get bigger. A negative correlation means that if one variable gets bigger, the other variable tends to get smaller.
What is a low negative correlation?
The correlation coefficient measures the strength of the relationship between two variables. That said, if two datasets have a correlation coefficient of -0.8, it would be considered a strong negative correlation. If they had a
correlation coefficient of -0.1
, it would be considered a weak negative correlation.
Which of the following correlations is the weakest quizlet?
(a) –
0.15
represents the weakest correlation.
What is a minimal correlation?
When two stocks have a correlation
between -0.1 and 0.1 there tends to be no relationship between the movements of the stock
. This indicates a minimal relationship, or no relationship at all.
What does a weak negative correlation mean?
Weak negative correlation:
When one variable increases, the other variable tends to decrease, but in a weak or unreliable manner
.
How do you determine if a correlation is positive or negative?
If the correlation coefficient is greater than zero, it is a positive relationship
. Conversely, if the value is less than zero, it is a negative relationship. A value of zero indicates that there is no relationship between the two variables.
How do you determine range?
The range is the difference between the smallest and highest numbers in a list or set. To find the range,
first put all the numbers in order. Then subtract (take away) the lowest number from the highest
. The answer gives you the range of the list.
How do you find the minimum range?
The range is a numerical indication of the span of our data. To calculate a range, simply
subtract the min (13) from the max (110)
.
What does the range measure?
The range, the difference between the largest value and the smallest value, is the
simplest measure of variability in the data
. The range is determined by only the two extreme data values.
Which of the following is the statistics that describes data?
Descriptive statistics
summarizes or describes the characteristics of a data set. Descriptive statistics consists of two basic categories of measures: measures of central tendency and measures of variability (or spread).
What uses the score of one variable to predict a range of scores for a second variable?
Regression models
predict a value of the Y variable, given known values of the X variables. Prediction within the range of values in the data set used for model-fitting is known informally as interpolation.
What score allows a researcher to compare scores across different scales?
The standard score (more commonly referred to as a z-score)
is a very useful statistic because it (a) allows us to calculate the probability of a score occurring within our normal distribution and (b) enables us to compare two scores that are from different normal distributions.
When a psychologist is making a determination?
When a psychologist is making a determination regarding whether or not a study is ethical, one should first consider – versus the
demand or desire for increased knowledge in a particular
field of study. Ethics is a discussion of how people – behavior.
What type of variable is return on investment in statistics?
What type of variable is “projected return on an investment”?
Continuous
it can be decimal or fraction, example gallons of gas.
Which of the following is the main purpose of descriptive statistics?
Descriptive statistics can be useful for two purposes: 1) to provide basic information about variables in a dataset and 2) to highlight potential relationships between variables. The three most common descriptive statistics can be displayed graphically or pictorially and are measures of:
Graphical/
Pictorial Methods.
Which of the following is a branch of statistics *?
The two main branches of statistics are
descriptive statistics and inferential statistics
. Both of these are employed in scientific analysis of data and both are equally important for the student of statistics.
What is the branch of statistics that involves drawing conclusions about a population based on information contained in a sample taken from that population?
Inferential statistics
is the branch of statistics that involves drawing conclusions about a population based on information contained in a sample taken from that population. The measurement made on each element of a sample need not be numerical.
Which is referred as the conclusions drawn from data gathered?
Analysis of data
is a process of inspecting, cleaning, transforming, and modeling data with the goal of highlighting useful information, suggesting conclusions, and supporting decision making. Data analysis is a process, within which several phases can be distinguished.
What is inferential data analysis?
With inferential statistics, you
take data from samples and make generalizations about a population
. … This means taking a statistic from your sample data (for example the sample mean) and using it to say something about a population parameter (i.e. the population mean).
What is inferential statistics used for?
Inferential statistics are often used
to compare the differences between the treatment groups
. Inferential statistics use measurements from the sample of subjects in the experiment to compare the treatment groups and make generalizations about the larger population of subjects.
How do you calculate inferential statistics?
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What is the highest level of measurement?
- Nominal scales. Nominal scales contain the least amount of information. …
- Ordinal scales. …
- Interval scales. …
- Ratio scales.
What is the highest level that a dichotomous variable can be measured?
Dichotomous variables are categorical variables with two levels. These could include yes/no, high/low, or male/female. To remember this, think di = two. Ordinal variables have two are more categories that can be ordered or ranked.
Which type of data can only be counted and not measured?
Discrete Data
We speak of discrete data if its values are distinct and separate. In other words: We speak of discrete data if the data can only take on certain values. This type of data can’t be measured but it can be counted. It basically represents information that can be categorized into a classification.
What is the difference between the highest and the lowest score in the given data?
The range
of a data set is the difference between the largest and smallest values in the set.
What is the difference of the highest and lowest?
The range
is the difference between the highest and lowest value in a set of values.
Is simply defined as the difference of the highest score and the lowest score?
The range
is simply the highest score minus the lowest score. Let’s take a few examples. What is the range of the following group of numbers: 10, 2, 5, 6, 7, 3, 4? Well, the highest number is 10, and the lowest number is 2, so 10 – 2 = 8.
