You must first normalize this in order to use a Z-score table. To convert what you have into a Z score you must use this formula: (x- mean) /standard deviation. In your case (334-310)/12=2. So now you want the probability that a score is greater than 334, which in turn means you want P(Z>2)=1-P(Z<2)=1-.9772=0.0228=2.28%.
Answer:
Part a)
Part b)
Step-by-step explanation:
Let
x------> the time in minutes
y-----> the total numbers of words
step 1
we have
-----> given table
<u>Find the slope of the linear equation</u>
with the slope m and the point A find the equation of the line
The equation of the line in point slope form is equal to
substitute
----> This is a linear direct variation
Part b) For
substitute the value of x in the linear equation to find the value of y
(p + r) - 7 < = 6 (thats less then or equal)