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What does a positive value of kurtosis indicate about a distribution?

It is skewed to the right (correct)

It is normally distributed

It is flat

It is skewed to the left

Which plot uses the median, quartiles, and maximum and minimum values as a summary of a frequency distribution?

Histogram

Bar graph

Box and whisker plot (correct)

Scatter plot

What are outliers in a data set?

Data points close to the median

Data points with average values

Data points with extreme values differing significantly from others (correct)

Data points with missing values

What does Q3 represent in quartiles?

The value that ¾ of the data points are less than Signup and view all the answers

What does P25 represent in percentiles?

The value that 25% of the population is less than Signup and view all the answers

In what type of distribution does a normal distribution have a kurtosis value near zero?

Peaked distribution Signup and view all the answers

What is the purpose of dividing by (n-1) instead of n when calculating the sample mean?

To reduce the impact of outliers on the sample mean Signup and view all the answers

Why shouldn't real values of outliers be discarded?

They are useful for investigating shape of the distribution Signup and view all the answers

What does a variance being a negative number indicate?

It is not possible for variance to be negative Signup and view all the answers

In the context of variance, what does a large value indicate?

High variability in the data Signup and view all the answers

What kind of diagram is used to represent the age distribution of patients in one town?

Histogram Signup and view all the answers

How would you describe the shape of the age distribution of patients in one town?

Bell-shaped (normal) Signup and view all the answers

What measure of central tendency would you use to compute the sample diastolic blood pressure mean?

Mean Signup and view all the answers

What measure of central tendency would you use to compute the sample diastolic blood pressure mode?

Mode Signup and view all the answers

What is the mean HbA1c level from the given data for 10 children?

5.5 Signup and view all the answers

What could be concluded about the value 18 in the given HbA1c data?

It is an outlier and should be removed from the data set before calculating the mean Signup and view all the answers

What type of variable is 'Self-rated health'?

Ordinal Signup and view all the answers

What type of variable is 'Total cholesterol concentration'?

Quantitative Signup and view all the answers

What type of variable is 'Economic activity'?

Nominal Signup and view all the answers

What type of variable is 'Having lung cancer or not'?

Binary Signup and view all the answers

In the context of biomedical datasets, what kind of variable would 'Obesity: BMI≥30' be classified as?

Binary Signup and view all the answers

What kind of variable is 'Marital status (married, divorced, widowed, ever single)'?

Nominal Signup and view all the answers

What type of variable are 'Restaurant star ratings' and 'Severity of pain (none, some, a lot)'?

Ordinal Signup and view all the answers

In a biomedical dataset, how would 'Rank on a scale of 1-5 your degree of satisfaction' be categorized?

Ordinal Signup and view all the answers

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Questions and Answers

What does a positive value of kurtosis indicate about a distribution?

Which plot uses the median, quartiles, and maximum and minimum values as a summary of a frequency distribution?

What are outliers in a data set?

What does Q3 represent in quartiles?

What does P25 represent in percentiles?

In what type of distribution does a normal distribution have a kurtosis value near zero?

What is the purpose of dividing by (n-1) instead of n when calculating the sample mean?

Why shouldn't real values of outliers be discarded?

What does a variance being a negative number indicate?

In the context of variance, what does a large value indicate?

What kind of diagram is used to represent the age distribution of patients in one town?

How would you describe the shape of the age distribution of patients in one town?

What measure of central tendency would you use to compute the sample diastolic blood pressure mean?

What measure of central tendency would you use to compute the sample diastolic blood pressure mode?

What is the mean HbA1c level from the given data for 10 children?

What could be concluded about the value 18 in the given HbA1c data?

What type of variable is 'Self-rated health'?

What type of variable is 'Total cholesterol concentration'?

What type of variable is 'Economic activity'?

What type of variable is 'Having lung cancer or not'?

In the context of biomedical datasets, what kind of variable would 'Obesity: BMI≥30' be classified as?

What kind of variable is 'Marital status (married, divorced, widowed, ever single)'?

What type of variable are 'Restaurant star ratings' and 'Severity of pain (none, some, a lot)'?

In a biomedical dataset, how would 'Rank on a scale of 1-5 your degree of satisfaction' be categorized?

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