I swear brainly needs to make it harder to create accounts 2
Answer:
Option A - 0.9938
Step-by-step explanation:
Given : Assume that blood pressure readings are normally distributed with a mean of 118 and a standard deviation of 6.4. If 64 people are randomly selected.
To find : The probability that their mean blood pressure will be less than 120?
Solution :
The formula to find the probability is
Where, X is the sample mean
is the population mean
is the standard deviation
n=64 is the number of sample
The probability that their mean blood pressure will be less than 120 is given by,
From the z-table the value of z at 2.5 is
Therefore, Option A is correct.
The probability that their mean blood pressure will be less than 120 is 0.9938.
Answer: The 1st and 2nd one in the first row of questions aren’t statistical questions, the one in the middle of those two are though. The 1st and 3rd one in the second row of questions is a stat question and the 2nd one in the second row isn’t. Hope this helped and wasn’t confusing, but i’m not really sure about this answer!
Answer:
The required function is and the graph of the function is shown below.
Step-by-step explanation:
It is given that A vat contains 18 gallons of liquid when a drain pipe opens and the liquid begins to leave the vat at a rate of 4 gallons per hour.
It means the initial liquid in tank is 17 gallons and rate of change is 4 gallons per hour.
y-intercept is (0,18).
Slope is -4.
The liquid in tank is defined by the function
At y=0 the tank will empty.
The x-intercept is (4.5,0).
Therefore the required function is and the graph of the function is shown below.
Answer:
Option B
Step-by-step explanation:
The answer is no
Correct option is B
There are two outputs 4 and -4 for the same input of -2