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put this solution on YOUR website!a)Find the standard deviation of the following set of data.
180, 187, 175, 186, 177, 196, 166
add the numbers and divide the sum by 7 to get the mean of 181
standard deviation is 9.6954...
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b)The results on an English exam are normally distributed. the z-scores for some of the students are shown below.
Jan 1.3 Kim 1.8 Lou -1.1 May 0.0
Nan 1.1 Fay -1.7 Gia 1.1 Sue -1.8
Which of the students scored below the mean?
When you have z-scores the mean corresponds to "0" because
the mean is zero distance from the mean.
So all the students with negative z-scores scored below the mean.
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Cheers,
Stan H.
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