Answer:
x=21
Step-by-step explanation:
x-7=14
add 7 to both sides
x=21
Answer:
13.5
Step-by-step explanation:
Round the .45 to .5
Answer:6
Step-by-step explanation:
Answer:
The probability is 0.9938
Step-by-step explanation:
In this question, we are asked to calculate the probability that the mean blood pressure readings of a group of people is less than a certain reading.
To calculate this, we use the z score.
Mathematically;
z = (mean - value)/(standard deviation/√N)
From the question, we can identify that the mean is 125, the value is 123 , the standard deviation is 9.6 and N ( total population is 144)
Let’s plug these values;
z = (125-123)/(9.6/√144) = 2.5
Now we proceed to calculate the probability with a s score less than 2.5 using statistical tables
P(z<2.5) = 0.9938
Answer:
90
Step-by-step explanation:
1125/100=11.25
11.25x8=90
