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In: Statistics and Probability
A survey in the N.Y. Times Almanac finds the mean commute time (one way) is 25.4...
A survey in the N.Y. Times Almanac finds the mean commute time (one way) is 25.4 minutes for the 15 largest US cities. The chamber of commerce in a city feels that their commute time is less and wants to publicize this fact. The mean for 25 randomly selected commuters is 21.1 minutes with a standard deviation of 5.3 minutes. At the α = 0.10 level, is the city's commute significantly less than the mean commute time for the 15 largest US cities? Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) A.) State the p-value. (Round your answer to four decimal places.) B.) State alpha. (Enter an exact number as an integer, fraction, or decimal.)
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orchestra answered 1 year agoRelated Solutions
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Among the thirty largest U.S. cities, the mean one-way commute time to work is 25.8 minutes....
Among the thirty largest U.S. cities, the mean one-way commute
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mong the thirty largest U.S. cities, the mean one-way commute time to work is 25.8 minutes....
mong the thirty largest U.S. cities, the mean one-way commute
time to work is 25.8 minutes. The longest one-way travel time is in
New York City, where the mean time is 38.8 minutes. Assume the
distribution of travel times in New York City follows the normal
probability distribution and the standard deviation is 7.7 minutes.
Use Appendix B.3
. What percent of the New York City commutes are for less than 27
minutes? (Round your intermediate calculations and final answer...
among the thirty largest us cities, the mean one-way commute time to work is 25.8 minutes....
among the thirty largest us cities, the mean one-way commute
time to work is 25.8 minutes. the longest one-way travel time is in
new york city, where the mean is 37.7 minutes. assume the
distribution of travel time in new york city follows the normal
probability distribution and the standard deviation is 6.7
minutes.
A. What percent of the New York City commutes are for less than
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The mean amount of time that a randomly selected mouse finds its way out of a...
The mean amount of time that a randomly selected mouse finds its
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noise would make the mouse to finish the maze faster (her theory).
She conducted an experiment to test her theory by placing a mouse
in the maze and measuring how long it takes to finish the maze with
a loud noise as stimulus. She randomly sampled 25 mice and measured
their times. The average...
According to the New York Times Almanac, a survey of 15 large U.S. cities found that...
According to the New York Times Almanac, a survey of 15 large
U.S. cities found that the average commute time one way to work was
25.4 minutes. A chamber of commerce executive feels that the one
way to work commute in her city is less than this and wants to
publicize this. In order to assess her belief, she randomly
selected 25 commuters in her city and found the average one way
commute time to work to be 22.1 minutes...
The mean age for a person getting married for the first time is 25.4 years. Assume...
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standard deviation of 4.9 years. (Give probability answers to four
decimal places.)
a) What is the probability that a person being married for the
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b) What is the probability that a person being married for the
first time is over 29.1 years old?
c) What is...
The data below represent commute times (in minutes) and scores on a well-being survey. Complete parts...
The data below represent commute times (in minutes) and scores
on a well-being survey. Complete parts (a) through (d)
below.
Commute Time (minutes), x
5
15
25
40
60
84
105
Well-Being Index Score, y
69.2
68.1
67.2
66.5
65.3
64.7
62.8
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y, as the response variable.
y = [ ] x + [ ]
(b) Interpret the slope and y-intercept,...
The data below represent commute times (in minutes) and scores on a well-being survey. Complete parts...
The data below represent commute times (in minutes) and scores
on a well-being survey. Complete parts (a) through (d)
below.
Commute Time (minutes), x
55
1515
3030
3535
5050
8484
105105
Well-Being Index Score, y
69.169.1
67.867.8
66.266.2
65.865.8
64.564.5
62.362.3
59.959.9
(a) Find the least-squares regression line treating the
commute time, x, as the explanatory variable and the index score,
y, as the response variable.
ModifyingAbove y with caretyequals=nothingxplus+left parenthesis
nothing right parenthesis
(Round to three decimal places as...
The data below represent commute times (in minutes) and scores on a well-being survey. Complete parts...
The data below represent commute times (in minutes) and scores
on a well-being survey. Complete parts (a) through (d) below.
Commute Time (minutes), x 5 15 30 40 50 84 105 Well-Being Index
Score, y 68.9 67.6 65.8 64.9 64.0 61.5 58.8 (a) Find the
least-squares regression line treating the commute time, x, as the
explanatory variable and the index score, y, as the response
variable. ModifyingAbove y with caret equalsnothingxplusleft
parenthesis nothing right parenthesis (Round to three decimal
places...
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