In a recent issue of the ieee spectrum, 84 engineering conferences were announced. four conferences lasted two days. thirty-six lasted three days. eighteen lasted four days. nineteen lasted five days. four lasted six days. one lasted seven days. one lasted eight days. one lasted nine days. let x = the length (in days) of an engineering conference.

the data is shown in the table below.

number of conferences

days lasted

4

2

36

3

18

4

19

5

4

6

1

7

1

8

1

9

calculate the sample mean of days of engineering conferences.

The sample mean of the days of engineering conferences is 5.5.

Step-by-step explanation:

The given data says that values of X are the length in days.

where X= 2, 3, 4, 5, 6, 7, 8, 9.

number of samples = 8.

we have to find the sample mean for the days.

Mean = .

         = .

         =.

Mean = 5.5.

∴ The sample mean of the days is 5.5.

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