The accompanying data represent the pulse rates (beats per minute) of nine stude
ID: 3236323 • Letter: T
Question
The accompanying data represent the pulse rates (beats per minute) of nine students. Treat the nine students as a population. Compute the z-scores for all the students. Compute the mean and standard deviation of these z-scores.
Student
Pulse
Student 1
77
Student 2
60
Student 3
60
Student 4
80
Student 5
73
Student 6
80
Student 7
80
Student 8
68
Student 9
73
Compute the z-scores for all the students.
(Round to the nearest hundredth as needed.)
Compute the mean of these z-scores.
(Round to the nearest tenth as needed.)
Compute the standard deviation of these z-scores.
(Round to the nearest tenth as needed.)
Explanation / Answer
From the given data we have
using central limit theorem, we have
z = (x - mu)/sigma
Hence using this formula we can compute the z-score as follows
Mean of z-scores = 0
std. dev. of z-scores = 1
Mean 73.875 std. dev. 6.623Related Questions
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