2. An internet service provider is testing its internet connection download speeds. A 1 gigabyte file is
downloaded and the number of seconds it takes is recorded. This test is performed 20 times. The times in
seconds are listed in the following table.
Download speeds (in seconds) for a 1 gigabyte le.
38 45 42 35 48
37 40 41 36 47
43 45 39 38 40
42 44 42 38 44
(1 point)
The sample mean is 41.2 seconds.
The sample mean is 38.6 seconds.
The sample mean is 40.4 seconds.
The sample mean is 39.2 seconds.
The sample mean is 41.2 seconds.
To find the sample mean of the download speeds, you need to calculate the average of all the data points.
Adding up all the times:
38 + 45 + 42 + 35 + 48 + 37 + 40 + 41 + 36 + 47 + 43 + 45 + 39 + 38 + 40 + 42 + 44 + 42 + 38 + 44 = 804
Dividing the sum by the number of data points (20):
804 / 20 = 40.2
Therefore, the sample mean is 40.2 seconds.
To find the sample mean of the download speeds, you need to calculate the average of the recorded times in seconds.
To do this, add up all the recorded times and then divide the sum by the number of times the test was performed (in this case, 20).
Adding up the recorded times:
38 + 45 + 42 + 35 + 48 + 37 + 40 + 41 + 36 + 47 + 43 + 45 + 39 + 38 + 40 + 42 + 44 + 42 + 38 + 44 = 824
Now divide the sum by 20 (the number of times the test was performed):
824 / 20 = 41.2
Therefore, the sample mean of the download speeds is 41.2 seconds.
So, the correct answer is:
The sample mean is 41.2 seconds.