
Statistical Analysis Quiz No 2
Quiz
•
Mathematics
•
12th Grade
•
Practice Problem
•
Hard
Elizabeth Gist
Used 1+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a higher standard deviation signify?
More variability in the data
Less variability in the data
No variability in the data
No conclusion can be drawn
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In linear regression, what does the coefficient of determination (R-squared) measure?
The strength of the relationship between independent and dependent variables
The slope of the regression line
The residual error in the model
The correlation between independent and dependent variables
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If all values in a dataset are identical, what is the standard deviation?
Zero
One
Indeterminate
Cannot be calculated
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In linear regression, what is the purpose of the intercept term?
It represents the change in the dependent variable for a unit change in the independent variable.
It shifts the regression line up or down on the y-axis.
It signifies the correlation between variables.
It is not necessary in linear regression.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which component of time series represents irregular fluctuations and unpredictable events?
Trend
Seasonality
Cyclical fluctuations
Residuals
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a normal distribution, what percentage of data points fall within one standard deviation from the mean?
25%
50%
68%
95%
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a dataset has outliers, how does this affect the standard deviation?
Standard deviation increases
Standard deviation decreases
Standard deviation remains unchanged
Cannot be determined without knowing the values of the outliers
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