Question

The table below shows the LOS for a sample of 11 discharged patients. Using the data in the table, calculate the mean, range, variance, and standard deviation, and then answer questions e and f. Round the variance and standard deviation to one decimal place.


a. Mean
b. Range
c. Variance
d. Standard deviation
e. What value is affecting the mean and SD of this distribution?
f. Does the mean adequately represent this distribution? If not, what would be a better measure of central tendency for this data set?


Patient Length of Stay LOS-Mean (5) (LOS-Mean)2
(x-x̅) (x-x̅)2
1 1
2 3
3 5
4 3
5 2
6 29
7 3
8 4
9 2
10 1
11 2


Okay so I have the answer for A-D however I don't know the answers for E-F. Can anyone help me please. Thank you very much I appreciate it.

Answer 1

e) LOS = 29 for one of the patients. This would be considered an outlier.

f) Perhaps a better measure of central tendency would be the median.

Answer 2

A manager wishes to find out whether there is a relationship between the number of radio
advertisement aired per week and the amount of sales (in hundreds of Birr) of a product.
The data for the sample are given below.
Number of Advertisement (X) 2 5 8 8 10 12
Sales (Y) 2 4 7 6 9 10

Answer 3

i need answer