2a) 0.50,0.30
2b) monday and friday
2c) 80degrees
Answer:
The confidence interval is
, in which n is the size of the sample.
Step-by-step explanation:
We have that to find our
level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Z-table as such z has a p-value of
.
That is z with a pvalue of
, so Z = 1.96.
Now, find the margin of error M as such

In which
is the standard deviation of the population and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 
The upper end of the interval is the sample mean added to M. So it is 
The confidence interval is
, in which n is the size of the sample.
Answer:
Graphed in the wrong place... the equation says the y-intercept is at -24 but there is no intercept drawn!!!!!!
Step-by-step explanation:
Answer:
Her car is 5 feet above sea level.
Step-by-step explanation:
The hiker is at 120 feet, she then goes 200 feet down which is 120-200. After going into the valley, she is at -80 feet. She then goes up 85 feet. -80+85=5. Her car is 5 feet above sea level.
Answer:
23
Step-by-step explanation: