document.write( "Question 1011188: Q)J.J. Thomson (1856 - 1940) discovered the electron by
\n" ); document.write( "negatively charged particles for which he could
\n" ); document.write( "measure the mass - change ratio. The ratio appeared to
\n" ); document.write( "be constant over a wide range of experimental
\n" ); document.write( "conditions and consequently could be characteristics of
\n" ); document.write( "a new particle. His observations from two cathode ray
\n" ); document.write( "tubes that used air as the gas are
\n" ); document.write( "Tube 1 0.57 0.34 0.43 0.32 0.48 0.40 0.40
\n" ); document.write( "Tube 2 0.53 0.47 0.47 0.51 0.63 0.61 0.48
\n" ); document.write( "(i) Draw dot diagram with solid dots for Tube 1
\n" ); document.write( "observations and circles for Tube 2 observations.
\n" ); document.write( "(ii) Calculate the mean and standard deviation for the
\n" ); document.write( "Tube 1 observations.
\n" ); document.write( "(iii) Calculate the mean and standard deviation for the
\n" ); document.write( "Tube 2 observations \n" ); document.write( "

Algebra.Com's Answer #626844 by Boreal(15235) $\"\"$ $\"About$

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Dot plot is using a dot on a number line
\n" ); document.write( "mean for tube 1 is 0.42
\n" ); document.write( "sd=0.085
\n" ); document.write( "mean for tube 2 is 0.53
\n" ); document.write( "sd for tube 2 is 0.066 \n" ); document.write( "

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