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10 questions
Find the Z-score.
Mean = 22
Standard Deviation: 3.1
x = 29
2.26
16.45
-2.26
1.26
Find the mean.
Z-score = -1.4
Standard Deviation: 7
x = 20
29.8
10.2
-21
35
Find the z-score value corresponding if the location is below the mean by 2 standard deviations
+2.00
-2.00
+1.25
-1.00
If I tell you that you scored at the 55th percentile on your final exam, you would know:
55% of the class scored the same or worse than you did
You earned a 55% on the exam
You failed the exam
45% of the class scored worse than you did
Which of the following is a formula that describes calculating a z-score?
Z = (score - mean) / stand. devation
Z = (mean - score) / stand. dev.
Z = score/stand. dev/ mean
Z = dragonball
What percentile is 74 in the following group of data (must be in order)?35, 65, 68, 100, 23, 69, 74, 70, 61, 90, 85, 55
60th
90th
75th
27th
Using this data: 70, 96, 74, 87, 89, 82, 80, 90, 81, 91, 95, 68.
find the mean. (Round to the nearest hundredth)
83.58
84
83.08
83
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