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. 68.81 78.54 70.73 83.14 80.74 86.41 101.19 98.16 Click the icon to view the table of critical t-values. (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.) OA. The travel tax is between $ and S for % of all cities. % probability that the mean travel tax for all cities is between $ % confident that the mean travel tax for all cities is between $ OB. There is a OC. One can be OD. One can be (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? and $ % confident that the all cities have a travel tax between $ . and $ and $
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. 68.81 78.54 70.73 83.14 80.74 86.41 101.19 98.16 Click the icon to view the table of critical t-values. (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.) OA. The travel tax is between $ and S for % of all cities. % probability that the mean travel tax for all cities is between $ % confident that the mean travel tax for all cities is between $ OB. There is a OC. One can be OD. One can be (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? and $ % confident that the all cities have a travel tax between $ . and $ and $
MATLAB: An Introduction with Applications
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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.
68.81 78.54 70.73 83.14 80.74 86.41 101.19
98.16
Click the icon to view the table of critical t-values.
(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.)
OA. The travel tax is between $ and $
OB. There is a
O C.
OD. One can be
One can be
for % of all cities.
% probability that the mean travel tax for all cities is between $
% confident that the mean travel tax for all cities is between $
% confident that the all cities have a travel tax between $
and $
dation
and $
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?
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