The mean is 6.3 and the standard deviation is 1.49. Scores within one standard deviation of the mean are between 6.3-1.49 = 4.81 and 6.3+1.49 = 7.79. How many of the students scored between those two values?
Tanya C.
asked • 10/25/17HOW MANY STUDENTS SCORED WITHIN ONE STANDARD DEVIATION OF THE MEAN? PLEASE SHOW WORKING OUT
MEAN : 6.3
MODE:6
MEDIAN:6
STUDENTS SCORES: 4,5,5,6,6,6,7,7,8,9
STANDARD DEVIATION: 1.49
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2 Answers By Expert Tutors
Andy C. answered • 10/25/17
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Mean + 1 std dev = 6.3 + 1.49 = 7.79
Mean - 1 std dev = 6.3 - 1.49 = 4.81
The scores of interest are in the interval (4.81, 7.79)
How many students scored in that range????
Hint: It rhymes with heaven
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