Frederick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin.He spun a 4 five time
s. Which statements are true? Choose all that apply.
A.For the experimental outcomes to be closer to the predicted outcome, the number of trials should be increased.
B.For the experimental outcomes to be closer to the predicted outcome, the number of trials should be decreased.
C.If the number of trials is changed, the experimental probability also changes.
D.If the number of trials is changed, the theoretical probability also changes.
E.If the number of trials is changed, the number of experimental outcomes also changes.
A.For the experimental outcomes to be closer to the predicted outcome, the number of trials should be increased.
B.For the experimental outcomes to be closer to the predicted outcome, the number of trials should be decreased.
C.If the number of trials is changed, the experimental probability also changes.
D.If the number of trials is changed, the theoretical probability also changes.
E.If the number of trials is changed, the number of experimental outcomes also changes.
1 answer:
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Given that:
Total number of fish = 140
Fish are green swordtails female = 44
Fish are green swordtails male = 36
Fish are orange swordtails female = 36
Fish are orange swordtails male = 24
Solution:
A. We have to find the probability that the selected fish is a green swordtail.
Therefore, the probability that the selected fish is a green swordtail is
B. We have to find the probability that the selected fish is male.
Therefore, the probability that the selected fish is a male, is
C. We have to find the probability that the selected fish is a male green swordtail.
Therefore, probability that the selected fish is a male green swordtail is
D.
We have to find the probability that the selected fish is either a male or a green swordtail.
Therefore, the probability the selected fish is either a male or a green swordtail is
Answer:
d. The average is equal to 12 ounces.
Step-by-step explanation:
In this problem, the drink filling machine must be perfectly calibrated at 12 ounces since it needs to be shut down in cases of overfilling (mean > 12 ounces) and underfilling (mean < 12 ounces). Therefore, the correct approach would be to test if the mean is 12 ounces and the correct set of hypothesis would be:
The correct alternative is d. The average is equal to 12 ounces.