Answer:
Step-by-step explanation:
<u>Confidence Interval</u>
When the population standard deviation is known, the formula for a confidence interval for a population mean is:
Where n is the sample size and z is the corresponding z-value from the standard normal distribution for the selected confidence level. The value of z for a 95% confidence interval is z=1.96. The rest of the values are
Calculating the confidence interval
Or, equivalently
Answer:
116.6 pounds
Step-by-step explanation:
Set up a proportion where x is the weight of her desk in pounds:
=
Cross multiply:
x = 116.6
So, her desk is 116.6 pounds
3 ways (uncertain)
1 red or blue or green + 3 other colours
Answer:
Add one to all the x and subtract 4 to all the y values
Step-by-step explanation:
(1,4)= (2,0)
(-4,2)=(-3,-2)
(4,-3)=(5,-7)