Intro Standard Deviation

Quiz
•
Mathematics
•
11th Grade
•
Hard
Anthony Clark
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The speeds of cars on the highway have a mean of 95 km/h with a standard deviation of 5 km/h. What percentage of cars averaged less than 85 km/h?
.15%
2.35%
2.5%
18.5%
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which distribution has the smallest standard deviation?
red
yellow
green
blue
they are all the same
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The z-score represents.....
the amount of standard deviations a data value is above or below the mean.
the percentile the data value is above or below the mean.
the amount of standard deviations a data value is above or below the median.
the percent the data value is above or below the mean.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the area of the shaded region.
0.16
0.84
0.68
0.34
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the area of the shaded region.
0.16
0.84
0.68
0.34
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What's the probability of the gray area? (Mean = 55, Standard dev = 2.5)
0.8185
0.8413
0.8641
0.8389
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The mean life of a tire is 30,000 km. The standard deviation is 2000 km.
Then, 68% of all tires will have a life between ___________ km and __________ km.
28,000 km and 32,000 km.
24,000 km and 34,000 km.
26,000 km and 34,000 km.
27,000 km and 31,000 km.
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