Question

In: Statistics and Probability

At one hospital there is some concern about the high turnover of nurses. A survey was...

At one hospital there is some concern about the high turnover of nurses. A survey was done to determine how long (in months) nurses had been in their current positions. The responses (in months) of 20 nurses were as follows.

23 2 5 14 25 36 27 42 12 8
7 23 29 26 28 11 20 31 8 36

Make a box-and-whisker plot of the data. (Select the correct graph.)

    


Find the interquartile range. (Enter an exact number.)
IQR =

Solutions

Expert Solution

Solution: Let us use table to calculate the required output.

Number Data(in months)
1 2 Minimum value=2
2 5
3 7
4 8
5 8
1st quartile=(8+11)/2=9.5
6 11
7 12
8 14
9 20
10 23
Median=23
11 23
12 25
13 26
14 27
15 28
3rd quartile=(28+29)/2=28.5
16 29
17 31
18 36
19 36
20 42 Maximum value=42

Step 1: Arrange the given data in ascending order.

2 5 7 8 8 11 12 14 20 23 23 25 26 27 28 29 31 36 36 42

Step 2: Find the median.

Median is the mean of the middle two numbers.

Median=(23+23)/2=23

Step 3: Find the first and third quartile.

The first quartile is the median of the data points to the left of the median(check in the first table)

1st quartile=(8+11)/2=9.5

The third quartile is the median of the data points to the right of the median(check in the first table)

3rd quartile=(28+29)/2=28.5

Step 4: Find minimum and maximum value

Minimum value=2

Maximum value=42

Step 5: Let us make the box plot for the above data set. I have drawn on the sheet of paper and the same is uploaded.

Step 6: IQR=Q3-Q1=28.5-9.5= 19


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