Answer :
To find the range and standard deviation of the given data set, follow these steps:
1. Determine the Range:
- The range of a data set is found by subtracting the smallest value from the largest value in the set.
- For the given data:
- Identify the smallest value, which is 49.
- Identify the largest value, which is 85.2.
- Calculate the range: [tex]\( 85.2 - 49 = 36.2 \)[/tex].
- So, the range of the data set is 36.2.
2. Calculate the Sample Standard Deviation:
- The standard deviation measures the amount of variation or dispersion in a data set.
- Since this is a sample, we use the formula for the sample standard deviation which accounts for one less degree of freedom.
- The standard deviation is calculated using the following steps (in practice, a calculator or software is typically used):
- Find the mean of the data set.
- Subtract the mean from each data value to find the deviations.
- Square each of these deviations.
- Find the average of these squared deviations by dividing by [tex]\( n-1 \)[/tex] (where [tex]\( n \)[/tex] is the number of data points, here [tex]\( n=10 \)[/tex]).
- Take the square root of this average to get the sample standard deviation.
- For the given data set, the standard deviation is approximately 13.1588 when rounded to four decimal places.
Thus, the results are:
- Range: 36.2
- Standard deviation: 13.1588
1. Determine the Range:
- The range of a data set is found by subtracting the smallest value from the largest value in the set.
- For the given data:
- Identify the smallest value, which is 49.
- Identify the largest value, which is 85.2.
- Calculate the range: [tex]\( 85.2 - 49 = 36.2 \)[/tex].
- So, the range of the data set is 36.2.
2. Calculate the Sample Standard Deviation:
- The standard deviation measures the amount of variation or dispersion in a data set.
- Since this is a sample, we use the formula for the sample standard deviation which accounts for one less degree of freedom.
- The standard deviation is calculated using the following steps (in practice, a calculator or software is typically used):
- Find the mean of the data set.
- Subtract the mean from each data value to find the deviations.
- Square each of these deviations.
- Find the average of these squared deviations by dividing by [tex]\( n-1 \)[/tex] (where [tex]\( n \)[/tex] is the number of data points, here [tex]\( n=10 \)[/tex]).
- Take the square root of this average to get the sample standard deviation.
- For the given data set, the standard deviation is approximately 13.1588 when rounded to four decimal places.
Thus, the results are:
- Range: 36.2
- Standard deviation: 13.1588