Five of your classmates measured the following baseline pulse rates in their worms: 9, 8, 7, 8, and 8 pulses per minute. What is the standard deviation for the measurements?

0.63

Explanation:

Given that:

baseline pulse rates in their worms = 9, 8, 7, 8, and 8 pulses per minute.

What is the standard deviation for the measurements?

Formula for solving standard deviation (σ) =

where;

N = number of people in the population

= individual entity in the population

x' = population mean

Our data given includes: 9,8,7,8,8 only

re-arranging what we have above in increasing order; we have:

7,8,8,8,9

∴ N = 5

x'(population mean) =

x'(population mean) =

x'(population mean) =

x'(population mean) = 8

                       (-x')                  (-x')²

     7                   (7-8) = -1              (-1)²=1

     8                   (8-8) = 0             (0)²=0

     8                   (8-8) = 0             (0)²=0

     8                   (8-8) = 0             (0)²=0

    9                   (9-8) = 1               (1)²=1            

= 40         = 0     = 2

(σ) =

(σ) =

(σ) =

(σ) = 0.63248

(σ) = 0.63

∴  the standard deviation for the measurements = 0.63

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).