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Module 8 Semester Review 4/30/24
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What are Descriptive statistics?
 
All of the answers
 
Measures of central tendency
 
Measure of variability (data spread)
 
Graphs and charts to visually represent the data
What is an interval level of measurement?
 
Measurement where values between variables has meaning
 
Variable data that can only be ranked
 
Variable data that can only be categorized
 
None of the answers
True or False: A continuous variable is a type of quantitative variable that can take on any value within a certain range of intervals?
True
True or False: A discrete variable can only take on a finite number, such as the number of students in a class??
True
What are examples of a categorical variable?
 
All the answers
 
Education level
 
Occupation
 
Animal Species
What type of test would be used to find a difference in the same individuals at two different times/conditions
 
Paired T test
 
ANOVA
 
Correlation
 
Time Series
What type of test is used to find an association between two categorical variables?
 
Chi-Squared
 
Regression
 
Paired t test
 
ANOVA
What is a correlation co-efficient?
 
All of the answers
 
Indicates how closely two variables are linked
 
Has values from +1 to -1
 
The two variables are the independent and dependent
True or False: A parametric test is based on a normal distribution?
True
What is a Confidence Interval?
 
All of the above
 
Range of values likely to Include parameter of interest
 
Provides a specified level of confidence for an estimate
 
95% confidence interval, means 95 out of 100 times
What is a cluster sample?
 
Sampling technique where population is divided into clusters
 
A sample from a non-normal distribution
 
Samples from various populations
 
A very large sample size
True or False: A Chi-square test assesses the differences between two categorical variables?
True
True or False: A variable is a factor that can vary or change?
True
What does correlation between two variables mean?
 
The Extent to which 2 or more variable fluctuate together
 
Two variables that can take on the same value
 
A variable that is continuous
 
None of the answers
For comparing the means of two separate groups, which is the best test?
 
Independent T-test
 
ANOVA
 
Chi-squared
 
Regression
Since p (.04) < a (.05), p < α, do we accept or reject the null hypothesis?
We reject the null hypothesis
True or False. When p > α, you should fail to reject the Null hypothesis.
True
What does a p-value represent in statistical tests?
 
The probability of the obtained results when null is true
 
A significance level
 
The sample mean
 
The variance in the sample population
What is a Parameter?
 
A numerical characteristic of a population
 
A sample Statistic
 
A value below which a given percentage of observations fall
 
A value that divides a list of numbers into quarters
True or False: The Null Hypothesis is a statement there is no significant difference or effect in the research observations.
True
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