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The weight of horses is normally distributed with a mean of 1850 lbs and a standard deviation of 22 lbs. What is the probability a horse will weigh more than 1900 lbs.?
1.16%
Find the z-score for normally distributed data with a mean of 22.4, a standard deviation of 3.8, and an x-value of 15.3.
-1.87
If the z-score of normally distributed data is 1.28, the mean is 100, and the standard deviation is 18, what is the x-value?
123.04
Find P(-.35 < z < 1.17).
.5158
What is the P(z < -.16) or P(z > .16)
.8728
Find P(x > 11) if the mean is 8 and the standard deviation is 1.2 for normally distributed data.
.0062
About 64% of all murder victims know their murderer. If there are 10 victims, what is the probability exactly 6 of them knew their murderer?
24.24%
Classify each of these data items as discrete or continuous: weight of semi trucks on I-90, number of gallons the trucks use in a day, the number of trucks that stop at the weigh stations on I-90
continuous, continuous, discrete
You are going to play a coin flipping game that costs $2 to play. You flip 2 coins. If you win $1.50 for each heads you flip, but nothing for tails, what is your expected value? Is this game fair?
Expected value = $1.50. You should NOT play this game because on average you'll lose $0.50 each time you play.
The University of Tennessee pitchers throw strikes 72% of the time. If they throw 10 pitches, what's the probability 7 of them are strikes?
26.42%
