What is the probability that a selected person either refused to answer or is between 30-49?
537/1205 or 0.446
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15
What is the probability that someone selected responded and is over 60?
202/1205 or 0.168
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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 185 girls in 400 births an unusually low number?
No. The value is within two standard deviations of the mean.
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15
What is the probability that the selected person refused to answer?
156/1205 or 0.129
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15
In Ohio's Pick 4 game, you pay $1 to select a sequence of four digits, such as 7709. If you buy only one ticket and win, your prize is $5,000 and your net gain is $4,999.โ What is the expected value?
-50ยข
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heart
Other team wins 10 points!
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seesaw
Swap points!
Okay!
gift
Win 20 points!
Okay!
thief
Give points!
5
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20
25
15
In a population, about 40% of people have brown eyes, 35% have blue, 12% have green, 7% have gray, and 6% have hazel. If two are selected, find the probability that at least one has brown eyes.
0.64
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15
In Ohio's Pick 4 game, you pay $1 to select a sequence of four digits, such as 7709. If you buy only one ticket and win, your prize is $5,000 and your net gain is $4,999.โ If you buy 1 ticket, what is the probability of winning?
1 / 10,000 or 0.0001
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15
The overhead reaches of adult females are normally distributed and have the following parameters: ยต = 205.5cm, ? = 8.6cm. If 1 adult female is randomly selected, find the probability that their mean overhead reach is greater than 218.4cm
0.0668
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15
If two people are selected, what is the probability that at least one of them responded?
0.983
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15
Find the area
area = 0.9492
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baam
Lose 20 points!
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shark
Other team loses 15 points!
Okay!
fairy
Take points!
5
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15
20
25
lifesaver
Give 5 points!
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15
If two people are selected, what is the probability that both responded and are between 22-29?
0.035
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15
Find the z-score
z = 1.15
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lifesaver
Give 15 points!
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seesaw
Swap points!
Okay!
shark
Other team loses 25 points!
Okay!
baam
Lose 10 points!
Oops!
15
The overhead reaches of adult females are normally distributed and have the following parameters: ยต = 205.5cm, ? = 8.6cm. If 49 adult females are randomly selected, find the probability that their mean overhead reach is less than 207.0cm