For the following data:
|
6.3
|
2.9
|
4.5
|
1.1
|
1.8
|
4.0
|
1.2
|
3.1
|
2.0
|
4.0
|
|
7.0
|
2.8
|
4.3
|
5.3
|
2.9
|
8.3
|
4.4
|
2.8
|
3.1
|
5.6
|
|
4.5
|
4.5
|
5.7
|
0.5
|
6.2
|
3.7
|
0.9
|
2.4
|
3.0
|
3.5
|
(a) Find the mean, variance, and standard deviation.
(b) Construct a frequency table with ?ve classes.
(c) Using the grouped data formula, ?nd the mean, variance, and standard deviation for the frequency table constructed in part (b) and compare it to the results in part (a).