Measures of Central Location

In the example provided, what is the mean of the observations X_1 = 9, X_2 = 5, X_3 = 2, X_4 = 9, X_5 = 3?

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What is the formula for calculating the sample mean of a dataset?

• The formula for calculating the sample mean (often denoted as x̄) of a dataset is: x̄ = (Σxi) / n, where Σxi is the sum of all sample values and n is the number of samples.

• The formula for calculating the sample mean is: x̄ = (Σxi * n), where Σxi is the sum of all sample values and n is the number of samples.

• The formula for calculating the sample mean is: x̄ = (Σxi) / (n-1), where Σxi is the sum of all sample values and n is the number of samples.

• The formula for calculating the sample mean is: x̄ = (Σxi) * (n-1), where Σxi is the sum of all sample values and n is the number of samples.

Using the Excel function, how can you calculate the average of a dataset?

• You can calculate the average of a dataset in Excel using the AVERAGE function. The syntax is AVERAGE(number1, [number2], ...), where you can input the range of cells containing the dataset.

• You can calculate the average of a dataset in Excel using the SUM function. The syntax is SUM(number1, [number2], ...), where you can input the range of cells containing the dataset.

• You can calculate the average of a dataset in Excel using the MAX function. The syntax is MAX(number1, [number2], ...), where you can input the range of cells containing the dataset.

• You can calculate the average of a dataset in Excel using the MIN function. The syntax is MIN(number1, [number2], ...), where you can input the range of cells containing the dataset.

What is the average insurance charge mentioned in the document?

• $12,000

• $13,270

• $14,500

• $15,000

Fill in the blank: The average charge can serve as a _______ for comparing individual claims.

• benchmark.

• estimate.

• outlier.

• average.

According to the document, what is the purpose of using average insurance charges?

• To increase premiums

• To serve as a benchmark

• To reduce claims

• To eliminate fraud

Based on the table, what is the average charge for the BMI group 31-35?

• $10,000

• $12,500

• $15,000

• $17,500

Outliers affect the average.

• True

• False

What is the mean widely used as?

• A) A standard measure for comparison

• B) A measure of variability

• C) A measure of correlation

• D) A measure of dispersion.