SOLUTION: In a speed-programming contest, the time (in minutes) to complete the first program was recorded for several participants. The data recorded is shown below: 2.8 3.3 5.6
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Question 1158983: In a speed-programming contest, the time (in minutes) to complete the first program was recorded for several participants. The data recorded is shown below: 2.8 3.3 5.6 3.7 2.8 3.4 2.5 4.8 2.9 3.6 4.4 4.0 5.2 3.0 4.8 Assume that this is a simple random sample. Based on this, answer the following questions.
A. What is the sample size for the above sample?
B. Calculate the sample mean for this data.
C. Calculate the sample median.
D. Compute the sample-variance
E. Compute the sample standard deviation. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! Sample size n=15
mean is sum/15=3.787
variance is sd^2 =0.9426
sd=0.9709
median is the 8th (middle) of ordered data from smallest to largest. Order the data and the 8th one will be 3.4
You must order the data from small to large or vice versa for the median. It is the middle point or the average of two middle points if there are an even number of items. The median of 5 ordered is 3, 2 on either side and one unique middle. The median of 8 is half way between the 4th nd the 5th, since there is no unique middle.
