Hey there!
Square root of four is positive or negative 2.
So we have:
or
Add or subtract.
or
Simplify the absolute value bars.
1 or 5
Hope this helps!
Help me out? tysvm!!!
1 answer:
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We know 445 employees take the train, and that 321 of these exclusively take the train. So 445 - 321 = 124 take both the train and bus.
Now, if
is the set of employees that take the bus and 
the set of employees that take the train, then
where
is the number of employees belonging to a general set 
.
So the probability that an employee takes either the bus or train is
Now, if
where
So the probability that an employee takes either the bus or train is
Answer:
0.13591.
Step-by-step explanation:
We re asked to find the probability of randomly selecting a score between 1 and 2 standard deviations below the mean.
We know that z-score tells us that a data point is how many standard deviation above or below mean.
To solve our given problem, we need to find area between z-score of -2 and -1 that is .
We will use formula to solve our given problem.
Using normal distribution table, we will get:
Therefore, the probability of randomly selecting a score between 1 and 2 standard deviations below the mean would be 0.13591.