Answer:
The 90% confidence interval for the mean usage of electricity is between 17.4 kwH and 17.6 kwH
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 Ztable as such z has a pvalue of 
So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645
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.
So
The lower end of the interval is the mean subtracted by M. So 17.5 - 0.14 = 17.4 kwH
The upper end of the interval is M added to the mean. So 17.5 + 0.14 = 17.6 kwH
The 90% confidence interval for the mean usage of electricity is between 17.4 kwH and 17.6 kwH
Answer:
14/24 can be a answer?
Step-by-step explanation:
Hope this helped :)
Answer:
$200
Step-by-step explanation:
Vin charges $25 each day for a booth at the flea market
4 people rented the booth on Saturday
= 25 × 4
= $100
4 people rented the booth on Sunday
= 25 × 4
= $100
Therefore the amount of rent collected by Vin can be calculated as follows
= $100 + $100
= $200
Slope is the average rate of change of a line over a specific interval. You can use it to solve practical problems because it also represents a “rate” over the it’s interval
What are the answer choices
