Question
In: Statistics and Probability
Will your flight get you to your destination on time? To the right are a histogram...
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Will your flight get you to your destination on time? To the right are a histogram and summary statistics for the percentage of delayed arrivals each month from 2001 thru 2006. Consider these data to be a representative sample of all months. There is no evidence of a time trend. (The correlation of Flights Delayed % with time is r=0.0160.016.) n= 72 x= 24.5556 s= 3.34564 |
a) Check the assumptions and conditions for inference about the mean. Select all that apply.
A. All of the assumptions and conditions for inference about the mean are met.
B. The 10% condition is not met.
C. The randomization condition is not met and the sample is not suitably representative.
D. The independence assumption is not met.
E. The nearly normal condition is not met.
b) Find a 99% confidence interval for the true percentage of flights that arrive late.
___ < (Delayed Flight)< ___ (Round to two decimal places as needed.)
c) Interpret this interval for a traveler planning to fly. Choose the correct answer below.
A. 99% of all months have delayed flights rates within the interval.
B. A randomly selected month has a 99% chance of having a delayed flight percentage within the interval.
C. We can be 99% confident that the interval contains the true mean monthly percentage of delayed flights.
D. There is a 99% chance that the true mean monthly percentage of delayed flights is within the interval.
Solutions
orchestra answered 1 year agoRelated Solutions
Will your flight get you to your destination on time? To the right are a histogram...
Will your flight get you to your destination on time? To the
right are a histogram and summary statistics for the percentage of
delayed arrivals each month from 2001 thru 2006. Consider these
data to be a representative sample of all months. There is no
evidence of a time trend. (The correlation of Flights Delayed %
with time is requals 0.004.) Complete parts a through c below.
Check the assumptions and conditions for inference about the
mean. Select all that...
If a histogram of data is skewed to the right, then _____. a. high values in...
If a histogram of data is skewed to the right, then _____.
a. high values in the data have a low frequency
b. high values in the data have a high frequency
c. low values and high values in the data are about equally
likely
d. low values in the data are much less likely than high
values
Consider the following relation AIRLINE TABLE Flight Date Flight ID Origin Destination Captain ID Captain Name...
Consider the following relation
AIRLINE TABLE
Flight
Date
Flight
ID
Origin
Destination
Captain
ID
Captain
Name
Number of Passengers on the Flight
April 10
111
Chicago
L.A.
111
Tracy
110
April 10
222
L.A.
Phoenix
222
Matt
105
April 12
111
Chicago
L.A.
444
Tim
98
April 12
333
L.A.
N.Y.
111
Tracy
75
April 12
444
L.A.
N.Y.
333
Pat
110
April 12
555
L.A.
Dallas
444
Tim
111
April 12
222
L.A.
Phoenix
555
Pat
107
Some of...
Destination Departing Flight Numbers (list all departing flight segments) Distance (round to nearest mile) Amount Miami...
Destination
Departing Flight Numbers (list all departing flight
segments)
Distance
(round to nearest mile)
Amount
Miami
Delta 3899/ Delta 951
993
$328
San Diego
Delta 3899/ Delta 1909
2,321
$609
New York City
Delta 3899/ Delta 2021
555
$508
Chicago
Delta 3899/ Delta 1608
516
$205
Seattle
Delta 3899/Delta 3642
2,568
$491
Salt Lake City
Delta 2899/ Delta 2611
1,831
$475
Boston
Delta 2109/ Delta 665
744
$579
Honolulu
Delta 876/ Delta 1559
4,594
$1,168
Denver
Delta 3899/ Delta 2871...
Please, I need to get this right. No one is yet to get it right, it...
Please, I need to get this right. No one is yet to get it right,
it has been answered on Chegg but is wrong
In a psychrometric process, Volume of a classroom = 300 m^3. and
temperature in the room is T= 20 oC, P=100 kPa relative humidity =
50%
if all the water vapor of air in the room is converted to liquid
at the same temperature, what is the
volume of the liquid water (mL).
I believe the...
1. A travel agency would like to track the destination of each flight. Given the following...
1.
A travel agency would like to track the destination of each
flight. Given the following business rule, what constraint(s) can
you apply to the flight table, given there is also a destination
table?
"A flight must be associated with a destination".
Question 1 options:
Referential integrity
Check constraint
Nullability
Default constraint
2.
Constraint applied to a one-to-many relationship when a
referenced record (on the 1 side) is deleted, then the referencing
records (on the Many side) should also be...
Suppose you know that the amount of time it takes your friend Susan to get from...
Suppose you know that the amount of time it takes your friend
Susan to get from her residence to class averages 50
minutes, with a standard deviation of 55 minutes. What proportion
of Susan's trips to class would take more than 50
minutes? . Enter your answers accurate to two decimal places.
What proportion of her class would take more than 50
minutes?
What proportion of Susan's trips to class would take less than
40 minutes?
What proportion of Susan's trips to class...
1 ) If a flight is on time 90% of the time, use a normal approximation...
1 ) If a flight is on time 90% of the time, use a normal
approximation to the binomial to find the probability that between
175 and 190 out of a total of 200 flights will be on time.
2)- In a study done by Statistics Weekly, they found that 12% of
people believe that there will eventually be a zombie apocalypse.
Suppose we have a random sample of 500, would it be unusual to find
43 people who believe...
1 ) If a flight is on time 90% of the time, use a normal approximation...
1 ) If a flight is on time 90% of the time, use a normal
approximation to the binomial to find the probability that between
175 and 190 out of a total of 200 flights will be on time.
2)- In a study done by Statistics Weekly, they found that 12% of
people believe that there will eventually be a zombie apocalypse.
Suppose we have a random sample of 500, would it be unusual to find
43 people who believe...
Create a two column frequency HISTOGRAM for the time (in seconds). Pets/No Pets. You can decide...
Create a two column frequency HISTOGRAM for the time
(in seconds). Pets/No Pets. You can decide the class boundaries. 0
– 49 seconds, 50-99 seconds, etc. Whatever seems appropriate.Two
bars in each time interval. Make them different colors, side by
side.
Draw one box & whisker plot for the aggregate (all)
“eccstatistics” results, adding both pets/no pets responders
together as one group. We are measuring time by seconds.Include a
5-number summary. I have no clue what I am doing.
Player...
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