Statistics
posted by Anonymous .
87,89,90,90,98,99,99,101,102,103,104
Within how many standard deviations of the mean is the value 102?

Find the mean first = sum of scores/number of scores
Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.
Standard deviation = square root of variance
Z score is your score in terms of standard deviations (SD).
Z = (scoremean)/SD
I'll let you do the calculations.
Respond to this Question
Similar Questions

Math
What is the cardinal number for the following sets? 
Math
What is the cardinal number for the follwing sets? 
statistics
98,99,99,103,101,102,104,89,87,90,90 Find the 25th and 75th percentiles. Within how many standard deviations of the mean is the value 102. Find the interquartile range. 
Statistics
98,99,99,103,101,102,104,89,87,90,90 Within how many standard deviations of the mean is the value 102? 
Statistics
87,89,90,90,98,99,99,101,102,103,104 Find the interquartile range. 
statistics
It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of … 
statistics
It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of … 
statistics
It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of … 
statistics
It is known that the population mean for the Full Scale IQ of the WAIS is 100 with a standard deviation of 15. A researcher assesses a sample of 200 adults and find that they have a mean Full Scale IQ of 102. The point estimate of … 
chemistry/statistics
replicate water samples were analyzed for water hardness with the following results : 102.2 , 102 .8 ,103.1, 102.3 of calcium trioxocarbonate . calculate the standard deviation of the mean and the coefficient of variation