If 1 of the subjects is randomly selected, find the probability of selecting someone who entered a plea of not guilty or was not sentenced to prison.
0.619
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15
How many people are under 25?
33
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15
If boys and girls are equally likely, groups of 400 births have a mean of 200 girls and a standard deviation of 10 girls. Is 232 girls in 400 births an unusually high number of girls?
Yes
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15
Listed below are numbers of enrolled students and numbers of burglaries for randomly selected large colleges in a recent year. Can we conclude that there is a linear correlation between enrollment and burglaries? Use â = 0.05
r = 0.561. Critical values: r = +- 0.632. P-value = 0.091. Fail to reject Ho
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15
Construct a frequency distribution of the 20 brain volumes (cm3) listed below. Use the classes 900-999, 1000-1099, etc. What is the class width? What are the midpoints? What are the class boundaries?
Class width: 100 Midpoints: 949.5, 1049.5, 1149.5, 1249.5, 1349.5, 1449.5 Boundaries: 898.5-999.5, 999.5-1099.5, etc.
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15
If 49 adult females are randomly selected, find the probability that they have a mean overhead reach less than 207.0 cm.
0.8888 (tech: 0.8889)
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15
A fan of Lady Antebellum music plans to make a custom CD with 12 of their 27 songs. How many different combinations of 12 songs are possible? Is it practical to make a different CD for each possible combination?
17,383,860. Not practical
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thief
Give points!
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magnet
Take 25 points!
Okay!
fairy
Take points!
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thief
Give points!
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lifesaver
Give 20 points!
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magnet
Take 10 points!
Okay!
shark
Other team loses 25 points!
Okay!
baam
Lose 10 points!
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thief
Give points!
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star
Double points!
Okay!
shark
Other team loses 20 points!
Okay!
thief
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15
If you plan to use a 0.05 significance level in a test of correlation between the systolic and diastolic readings, what are the critical values of r?
+- 0.878
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15
Find the probability of randomly selecting 1 of the 839 challenges and getting a challenge that was accepted, given that it was made by a female player.
126 / 350 or 0.360
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15
Find the probability of randomly selecting 1 of the 839 challenges and getting a challenge that was accepted and was made by a female player.
126 / 839 or 0.150
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15
What is the frequency for class 4.5-6.5?
30
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15
Using the following sample data, find the z score corresponding to the eye height of 1642 mm. Is it unusual? Why/why not? :: 1550, 1642, 1538, 1497, 1571
z = 1.54 :: This is not unusual because the value falls between 2 standard deviations of the mean