Answer:
a)
b)
c) We are 99% confident that the true mean for the costs of an order for the local pizzeria is between 20.766 and 25.234
d) For this case if we decrease the confidence then the margin of error would be lower and that implies a narrower interval. Becuase the critical value is lower if the decrease the confidence level
Step-by-step explanation:
Data provided
represent the sample mean for the cost of orders
represent the sample population deviation
n=300 represent the sample size
Part a
The confidence interval for a true mean is given by:
(1)
And the margin of error is given by:
The Confidence is 0.99 or 99%, the significance is and , and the critical value would be
Part b
The confidence interval would be:
Part c
We are 99% confident that the true mean for the costs of an order for the local pizzeria is between 20.766 and 25.234
Part d
For this case if we decrease the confidence then the margin of error would be lower and that implies a narrower interval. Becuase the critical value is lower if the decrease the confidence level
Each number in the code can be 1 of 10 numbers.
The total number of possible combinations is 10 * 10 * 10 * 10 = 10,000
The probability of getting 1234 would be 1/10,000
Answer:
Graph C. Hope this is correct!!!
Step-by-step explanation:
C is your answer.
It contains the proper points and form. A is not in point-slope form and B has the incorrect slope.
We can use the point-slope equation:
m, the slope, is 3/4:
To find b, we plug in the point (4,1/3):
Therefore, the point-slope equation is
Now we have to see which answer matches.
Since this is not the same, we try the next one.
This is the same, so this is the answer. We should still double-check the other answers.
This one is not equivalent.
This one also does not work.
The answer is the second one: