Math Problem Statement
Using technology, find the range and standard deviation. Round to two decimals places.
The table below gives the number of hours spent watching TV last week by a sample of 24 children.
27 74 89 36 50 81 27 90 83 44 57 68 60 24 33 58 74 47 24 30 27 90 95 12
Range =
Standard Deviation =
Solution
To find the range and standard deviation of the given data set, let's follow these steps:
Step 1: Calculate the Range
The range is the difference between the maximum and minimum values in a data set.
-
Identify the maximum and minimum values:
- Maximum value: 95
- Minimum value: 12
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Calculate the range:
Step 2: Calculate the Standard Deviation
The standard deviation measures the amount of variation or dispersion in a set of values.
- Calculate the mean (average) of the data set.
-
Find the squared differences from the mean for each data point.
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Calculate the variance, which is the average of the squared differences.
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Take the square root of the variance to get the standard deviation.
Let's compute these using the given data.
Data Set
Now let's calculate it step-by-step using Python.The results for the given data set are:
- Range = 83
- Standard Deviation = 25.32
Would you like more details on the calculations or have any questions?
Related Questions:
- How is the variance different from the standard deviation?
- What is the difference between population and sample standard deviation?
- How can outliers affect the standard deviation?
- How do you interpret the standard deviation in the context of a data set?
- What is the importance of calculating the range in a data set?
Tip:
To better understand data dispersion, always consider both the range and standard deviation together, as they provide different insights into data variability.
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Math Problem Analysis
Mathematical Concepts
Statistics
Data Dispersion
Range
Standard Deviation
Formulas
Range = Maximum - Minimum
Standard Deviation = sqrt((Σ(x - mean)^2) / N)
Theorems
Measures of Dispersion
Variance and Standard Deviation
Suitable Grade Level
Grades 10-12
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