Answer:
9
Step-by-step explanation:
Answer:
x= -1
Step-by-step explanation:
First add 2x to the 7x it will look like this
9=9x
Now you need x by itself so divide 9 on both sides it will look like this
1=x and thats your answer just swap the x and the 1
Average systolic blood pressure = x = 130
Standard deviation = s = 6
We are to find interval that represents the systolic blood pressure of middle 99.7% of the males.
According to the empirical rule:
a) 68% values lie within 1 standard deviation of the mean
b) 95% values lie within 2 standard deviation of the mean
c) 99.7% values lie within 3 standard deviation of the mean
So, 99.7% value will lie within 3 standard deviations from the mean.
We can express this range as:
( x - 3s, x + 3s)
= (130 - 3(6), 130 +3(6))
= ( 130 - 18, 130 + 18)
= ( 112, 148 )
Thus the interval from 112 to 148 contains the systolic blood pressure of middle 99.7% of the males in the certain town
Answer:
>
Step-by-step explanation:
