The probability of choosing a penny from the 1980s from the bag of pennies without looking is 3/40 . Which term best describes t
2 answers:
Answer: Unlikely
Step-by-step explanation:
Given: The probability of choosing a penny from the 1980s from the bag of pennies without looking=
We know that the probability of any event lies between 0 and 1.
- If probability of occurring event is 0 then the event is impossible.
- If probability of occurring any event is 1 then the event certain.
- If probability of occurring any event lies between 0.5 and 1 then the event is said to be likely.
- If probability of occurring any event lies between 0 and 0.5 then the event is said to be unlikely.
Since, 0.075 lieas between 0 and 0.5, therefore the event is said to be unlikely.
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Answer:
The z-score for SAT exam of junior is much small than his ACT score. This means he performed well in his ACT exam and performed poor in his SAT exam.
Step-by-step explanation:
Mean SAT scores = 1026
Standard Deviation = 209
Mean ACT score = 20.8
Standard Deviation = 4.8
We are given SAT and ACT scores of a student and we have to compare them. We cannot compare them directly so we have to Normalize them i.e. convert them into such a form that we can compare the numbers in a meaningful manner. The best way out is to convert both the values into their equivalent z-scores and then do the comparison. Comparison of equivalent z-scores will tell us which score is higher and which is lower.
The formula to calculate the z-score is:
Here, μ is the mean and σ is the standard deviation. x is the value we want to convert to z score.
z-score for junior scoring 860 in SAT exam will be:
z-score for junior scoring 16 in ACT exam will be:
The z-score for SAT exam of junior is much small than his ACT score. This means he performed well in his ACT exam and performed poor in his SAT exam.