A study from 2014 found that adults in the US spend an average of 11 hours per day watching, reading, listening to or simply interacting with media. Researchers at UCLA suspect students spend less time engaging media. They grouped UCLA students by class section, randomly selected 20 class sections, and administered a survey to each student in those randomly selected class sections. The following data represents the mean time (in hours) per day spent engaging media for each of the randomly selected classes:9.511.56.07.589.510.511128.259.58.29.310.811138.69.510.5What would be the calculator steps to find standard deviaton, rounded to 3 decimal places?

Question
Asked Apr 30, 2019

A study from 2014 found that adults in the US spend an average of 11 hours per day watching, reading, listening to or simply interacting with media. Researchers at UCLA suspect students spend less time engaging media. They grouped UCLA students by class section, randomly selected 20 class sections, and administered a survey to each student in those randomly selected class sections. The following data represents the mean time (in hours) per day spent engaging media for each of the randomly selected classes:

9.5 11.5 6.0 7.5 8 9.5 10.5 11 12 8.2
5 9.5 8.2 9.3 10.8 11 13 8.6 9.5 10.5

What would be the calculator steps to find standard deviaton, rounded to 3 decimal places?

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Expert Answer

Step 1

In this question, we have data of 20 randomly selected class sections, we have the mean time spent by student of each section on media, we have to calculate the Standard deviation.

Step 2

Steps to Calculate the Standard Deviation, 

  • Make a table in which first column must be X in which you have to write the given values
  • Then, I have to make another column, in which I have to write square of each giv...
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