Concept explainers
Muzzle Velocity The following data represent the muzzle velocity (in meters per second) of rounds fired from a 155-mm gun.
- a. Compute the sample
mean andmedian muzzle velocity. - b. Compute the
range , sample variance, and sample standard deviation.
(a)
To compute: The sample mean and median muzzle velocity.
Answer to Problem 1RE
The sample mean and median is 795.21 and 792.40 meter per seconds.
Explanation of Solution
Given info:
The data represent the muzzle velocity (in meter per second) round-fired gun from 155mm.
Calculation:
Software procedure:
A step-by-step procedure for obtaining summary statistics, the mean, median, range, sample variance, and standard deviation for the data of muzzle velocity is given as follows:
- Choose Stat > Basic Statistics > Display Descriptive Statistics.
- In Variables enter the columns Variable.
- Click OK.
The Minitab output for muzzle velocity:
(b)
To compute: The range, sample variance, and standard deviation
Answer to Problem 1RE
The range is 4.80 m/sec,
The sample variance is 2.03 m/sec,
The standard deviation is 1.42 m/sec.
Explanation of Solution
From the Minitab output obtained in part (a), the range is 4.80 m/sec, sample variance is 2.03 m/sec, and the standard deviation is 1.42 m/sec.
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