Answer:
The 95% confidence interval for the mean change in blood pressure, , is 1.744 < < 2.816
Step-by-step explanation:
The parameters given are;
The number of people in the sample, n = 9
The average drop in blood pressure, = 2.28 points
The standard deviation, σ = 0.82
The confidence level = 95%
The formula for confidence interval with a known mean is given as follows;
Where:
= z - score at 95% confidence level = 1.96
We therefore have;
Which gives the 95% confidence interval for the mean change in pressure, , is given as follows;
1.744 < < 2.816
Multpily the whole number by the percents number form. example would be 64% of 34. You do 34 times .64
you move the decimal to the left to change the percent to a real number and then mulitply it by the number asked
It should be around the square root of 135. Around 11 and 14/23
The temperature in Tallahassee should be -2 degrees Celsius.
Use the Pythagorean theorem for right triangles to solve this
a^2 + b^2 = c^2 where 'a' and 'b' are the legs of the triangle and 'c' is the hypotenuse
so:
8^2 + b^2 = 17^2 solve for the second leg, b
64 + b^2 = 289
b^2 = 289 - 64= 225
b = 15