step 20.52 Bad Weather, Bad Tips? As part of the study of tipping in a restaurant that we met in Example 16.3 (page 374), the psychologists also studied the size of the tip in a res- taurant when a message indicating that the next day's weather would be bad was written on the bill. Here are tips from 20 patrons, measured in percentage of the total bill:34 PS 18.0 19.1 19.2 18.8 18.4 19.0 18.5 16.1 16.8 14.0 19.4 17.0 13.6 17.5 20.0 20.2 18.8 18.0 23.2 18.2 Do the data give convincing evidence that the mean percentage tip for all patrons of this restaurant when their bill contains a message that the next day's weather will be bad is less than 20%? (Note that 20% is an of ten-recommended size for restaurant tips.)
step 20.52 Bad Weather, Bad Tips? As part of the study of tipping in a restaurant that we met in Example 16.3 (page 374), the psychologists also studied the size of the tip in a res- taurant when a message indicating that the next day's weather would be bad was written on the bill. Here are tips from 20 patrons, measured in percentage of the total bill:34 PS 18.0 19.1 19.2 18.8 18.4 19.0 18.5 16.1 16.8 14.0 19.4 17.0 13.6 17.5 20.0 20.2 18.8 18.0 23.2 18.2 Do the data give convincing evidence that the mean percentage tip for all patrons of this restaurant when their bill contains a message that the next day's weather will be bad is less than 20%? (Note that 20% is an of ten-recommended size for restaurant tips.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
20.52
Transcribed Image Text:89
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n instruments.
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7
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1
19
20.51
1022
2256
938
1339
1262
1438
1735
1020
1284
3052
1287
1930
1964
2549
3340
3050
Practical Significance? Give a 90% confidence interval
for the mean time advantage of right-hand over left-hand
threads in the setting of Exercise 20.49. Do you think
that the time saved would be of practical importance if
the task were performed many times-for example, by an
assembly-line worker? To help answer this question, find
the mean time for right-hand threads as a percentage of
the mean time for left-hand threads. Lil RTLFT
20.52 Bad Weather, Bad Tips? As part of the study of tipping
in a restaurant that we met in Example 16.3 (page 374),
the psychologists also studied the size of the tip in a res-
taurant when a message indicating that the next day's
weather would be bad was written on the bill. Here are
tips from 20 patrons, measured in percentage of the
total bill: 34
step
1/P3
18.0 19.1 19.2 18.8 18.4 19.0 18.5 16.1 16.8 14.0
17.0 13.6 17.5 20.0 20.2 18.8 18.0 23.2 18.2 19.4
Do the data give convincing evidence that the mean
percentage tip for all patrons of this restaurant when
their bill contains a message that the next day's weather
will be bad is less than 20%? (Note that 20% is an of
ten-recommended size for restaurant tips.)
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