Q. For the following set of data, find the sample standard deviation, to the nearest thousandth.96,63,83,78,55,96,114,52
List Data Set: List the given data set and verify its correctness.The given data set is: 96,63,83,78,55,96,114,52.We need to ensure that all values are correctly listed and there are no duplicates or missing values unless intentionally repeated.
Calculate Mean: Calculate the mean (average) of the data set.To find the mean, sum all the values and divide by the number of values.Mean = (96+63+83+78+55+96+114+52)/8Mean = (637)/8Mean = 79.625
Subtract and Square: Subtract the mean from each data value and square the result.This step is part of calculating the variance, which is the average of the squared differences from the Mean.Squared differences: (96−79.625)2=268.515625(63−79.625)2=277.515625(83−79.625)2=11.390625(78−79.625)2=2.640625(55−79.625)2=608.015625(96−79.625)2=268.515625(114−79.625)2=1180.515625(52−79.625)2=767.015625
Sum Squared Differences: Sum the squared differences.Sum of squared differences = 268.515625+277.515625+11.390625+2.640625+608.015625+268.515625+1180.515625+767.015625Sum of squared differences = 3384.125
Calculate Variance: Divide the sum of squared differences by the sample size minus one to get the sample variance.Since we have 8 data points, we divide by 7 (n−1 for a sample standard deviation).Sample variance = rac{3384.125}{7}Sample variance = 483.44642857
Calculate Standard Deviation: Take the square root of the sample variance to get the sample standard deviation.Sample standard deviation = 483.44642857Sample standard deviation ≈21.986
Round Standard Deviation: Round the sample standard deviation to the nearest thousandth.Rounded sample standard deviation = 21.986
More problems from Identify discrete and continuous random variables