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Answer:
a) The average salary of firefighters in Portugal is $583.
b) The standard deviation of the salary of firefighters in Portugal is $319.8
Step-by-step explanation:
We are given the following in the question:
a) Standard Deviation, σ = $145.80
We are given that the distribution of salary of professor is a bell shaped distribution that is a normal distribution.
Formula:
A salary of $510.10 has a z-score of -0.50.
Putting values, we get,
Thus, the average salary of firefighters in Portugal is $583.
b) Mean, μ = $2,132
We are given that the distribution of salary of computer programmers is a bell shaped distribution that is a normal distribution.
Formula:
The salary of $2,291.90 has a z-score of +0.50
Putting values, we get,
Thus, the standard deviation of the salary of firefighters in Portugal is $319.8
By applying the midpoint rule, the midpoint of line segment FB is equal to point L.
<h3>What is a number line?</h3>A number line can be defined as a type of graph with a graduated straight line which contains both positive and negative numerical values that are placed at equal intervals along its length.
By critically observing the number line (see attachment), we can logically deduce the following parameters:
- Point F is located at -2
- Point B is located at 8.
By applying the midpoint rule, the midpoint of line segment FB is given by:
Midpoint of FB = (-2 + 8)/2
Midpoint of FB = 6/2
Midpoint of FB = 3.
In conclusion, a point which corresponds to 3 on the number line is point L.
Read more on midpoint here: brainly.com/question/8512667
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