Chapter 1.3, Problem 98E

(a)

To determine

To calculate the range of given data and also removing the data value 120.

Answer to Problem 98E

With all data values, Range = 52

After removing 120 = 36

Explanation of Solution

Given:

71	104	76	88	78	71	68	86	70	90
74	76	69	68	88	96	68	82	120

Formula used:

  $\text{Range = Highest value - Lowest value}$

Calculation:

With all the data values:

  $\begin{array}{c}\text{Range = Highest value - Lowest value}\\ \text{= 120 - 68}\\ \text{= 52}\end{array}$

After removing the 120 from the data values:

  $\begin{array}{c}\text{Range = Highest value - Lowest value}\\ \text{= 104 - 68}\\ \text{= 36}\end{array}$

(b)

To determine

To interpret the range value of given data.

Explanation of Solution

The range is the difference between lowest and highest value of the dataset, which shows that all the data values falls within 52 values or between the highest and lowest values.

Since the 120 was removed due to the medical issues, then the range of the remaining data becomes 36 and that means the normal range of pulse rate is 36 and which indicates that normal pulse rate falls between 68 to 104.