Can you help me with this math problem and tell me how to do it?
1 answer:
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Answer:
The Z score of the person is -3.09.
Step-by-step explanation:
The standard normal deviate (Z) for a normal distribution is given by
where,
X = the value of observation
is mean of the observations and
σ = standard deviation of the score
Applying values we get
We are given that there are a total of 78 students. If we set the following variables:
Then, the sum of all of these must be 78, that is:
Since there are 15 in chemistry and physics and 47 in chemistry, we may replace that into the equation and we get:
Simplifying:
Now we solve for P by subtracting 62 on both sides:
Therefore, there are 16 students in physics
Graph the line using the slope and y-intercept, or two points.
Slope:
1
2
1
2
y-intercept:
(
0
,
−
2
)
(
0
,
-
2
)
x
y
0
−
2
2
−
1
Slope:
1
2
1
2
y-intercept:
(
0
,
−
2
)
(
0
,
-
2
)
x
y
0
−
2
2
−
1