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Statistical Analysis Quiz No 2

Authored by Elizabeth Gist

Mathematics

12th Grade

Used 1+ times

Statistical Analysis Quiz No 2
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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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