The following data were collected as part of a study of coffee consumption among graduate students. The...

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Biology

The following datawere collected as part of a study of coffee consumption amonggraduate students. The following reflect cups per day consumed:
3Â Â Â Â Â Â Â Â Â 4Â Â Â Â Â Â Â Â Â 6Â Â Â Â Â Â Â Â Â 8Â Â Â Â Â Â Â Â Â 2Â Â Â Â Â Â Â Â Â 1Â Â Â Â Â Â Â Â Â 0Â Â Â Â Â Â Â Â Â 2
X
X²
0
0
1
1
2
4
2
4
3
9
4
16
6
36
8
64
26
134
Compute the sample mean.
Compute the sample standard deviation.
Compute the median.
Compute the first and third quartiles.
Which measure, the mean or median, is a better measure of atypical value? Justify.
Which measure, the standard deviation or the interquartilerange, is a better measure of dispersion? Justify.

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3.9 Ratings (373 Votes)

Coffee consumption among graduate students a Sample mean X is defined as sum of total events x divided by number of total eventsn ie X x n Here total number of events is n8 SoX 346821028 X 268 X 325 Hence sample mean X is 325 b Sample standard deviation is the measure of the spread of the data The formula to calculate it is square root of xiX2 divided by n1 xiX2n1 where s sample standard deviation xi observed values of sample n number of See Answer

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