The following data represent the amount of time (in minutes) a random sample of
ID: 3063400 • Letter: T
Question
The following data represent the amount of time (in minutes) a random sample of eight students took to complete the online portion of an exam in a particular statistics course. Compute the mean, median, and mode time.
64.864.8,
75.875.8,
83.983.9,
114.7114.7,
128.4128.4,
94.994.9,
94.794.7,
123.4123.4
Compute the mean exam time. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A.
The mean exam time is
nothing.
(Round to two decimal places as needed.)
B.
The mean does not exist.
Compute the median exam time. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A.
The median exam time is nothing
(Round to two decimal places as needed.)
B.
The median does not exist.
Compute the mode exam time. Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A.
The mode is
nothing.
(Round to two decimal places as needed. Use a comma to separate answers as needed.)
B.
The mode does not exist.
Explanation / Answer
Mean = Sum of observations/Number of observations
= (64.8 + 75.8 + 83.9 + 114.7 + 128.4 + 94.9 + 94.7 + 123.4)/8
= 97.575
The mean time is 97.58
Data in asceding order
64.8, 75.8, 83.9, 94.7, 94.9, 114.7, 123.4, 128.4
Median = Average of 4th and 5th terms
= (94.7+94.9)/2
= 94.8
The median exam time is 94.8
No number is having frequency higher than 1.
The mode does not exist
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