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Statistics - Chapter 6 Quiz #7 Flashcards | StudBud
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Statistics - Chapter 6 Quiz #7
Statistics - Chapter 6 Quiz #7
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#zscore
Flashcards
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Questions
10
Answers
1
Find the shaded area for a Normal Model between z-scores negative ∞ & -0.5 using normalcdf(
30.85%
99%
308.5%
3.08%
2
A
z-score
is a standardized value that measures the distance of each data value from the:
mode
standard deviation
median
mean
3
If a person's test z-score is a POSITIVE number, which of the following is true?
they did better than average on their test
none of the above
they did average on their test
they did worse than average on their test
4
According to the 68-95-99.7 Rule, 99.7% of the data falls within ___ SD of the mean.
0
1
3
2
5
Find the shaded area for a Normal Model between z-scores 0.8 and 2.4 using the normalcdf(
20.4%
6.5%
2.04%
95.4%
6
According to the 68-95-99.7 Rule, 68% of the data falls within ___ SD of the mean.
2
1
3
0
7
A normal model is bell-shaped because the distribution is:
mostly symmetric
bimodal
unimodal
skewed
8
The class average on a test was 80% with a SD of 4 points. You got a 70%. What is your z-score?
+50
-50
+2.5
-2.5
9
The class average on a test was 93% with a SD of 7 points. You got a 94%. What is your z-score?
-0.14
+0.14
+80.71
-80.71
10
Find the shaded area for a Normal Model between z-scores 1.3 and positive ∞ using normalcdf(
6.5%
2.9%
96.8%
9.68%
