The accompanying data represent the total travel tax (in dollars) for a 3-day business trip in 8 randomly selected cities. Anormal probability plot suggests the data could come from a population that is normally distributed. A boxplot indicates there are no outliers. Complete parts (a) through (c) below. 68.38 80.75 68.27 84.69 82.93 86.62 101.96 99.46 (a) Determine a point estimate for the population mean travel tax. A point estimate for the population mean travel tax is $ (Round to two decimal places as needed.) (b) Construct and interpret a 95% confidence interval for the mean tax paid for a three-day business trip. Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) O A. One can be % confident that all cities have a travel tax between $ and $ OB. The travel tax is between $ and S for % of all cities OC. There is a S probabity that the mean travel tax for all cities is between $ and $ OD. One can be % confident that the mean travel tax for all cities is between S and S. (c) What would you recommend to a researcher who wants to increase the precision of the interval, but does not have access to additional data? The researcher oould v the
The accompanying data represent the total travel tax (in dollars) for a 3-day business trip in 8 randomly selected cities. Anormal probability plot suggests the data could come from a population that is normally distributed. A boxplot indicates there are no outliers. Complete parts (a) through (c) below. 68.38 80.75 68.27 84.69 82.93 86.62 101.96 99.46 (a) Determine a point estimate for the population mean travel tax. A point estimate for the population mean travel tax is $ (Round to two decimal places as needed.) (b) Construct and interpret a 95% confidence interval for the mean tax paid for a three-day business trip. Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) O A. One can be % confident that all cities have a travel tax between $ and $ OB. The travel tax is between $ and S for % of all cities OC. There is a S probabity that the mean travel tax for all cities is between $ and $ OD. One can be % confident that the mean travel tax for all cities is between S and S. (c) What would you recommend to a researcher who wants to increase the precision of the interval, but does not have access to additional data? The researcher oould v the
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Transcribed Image Text:The accompanying data represent the total travel tax (in dollars) for a 3-day business trip in 8 randomly selected cities. A normal probability plot suggests the data could come from a population that is normally distributed. A boxplot indicates there are no outliers. Complete parts (a) through (c) below.
68.38
80.75
68.27
84.69
82.93
86.62 101.96
99.46 D
.....
(a) Determine a point estimate for the population mean travel tax.
A point estimate for the population mean travel tax is $
(Round to two decimal places as needed.)
(b) Construct and interpret a 95% confidence interval for the mean tax paid for a three-day business trip. Select the correct choice below and fill in the answer boxes to complete your choice.
(Round to two decimal places as needed.)
O A. One can be
% confident that all cities have a travel tax between $
and $
O B. The travel tax is between $
and $
for % of all cities.
O C. There is a
% probability that the mean travel tax for all cities is between $
and $
O D. One can be
% confident that the mean travel tax for all cities is between $
and $
(c) What would you recommend to a researcher who wants to increase the precision of the interval, but does not have access to additional data?
The researcher could
the
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