The accompanying data represent the total travel tax (in dollars) for a 3-day business trip in 8 randomly selected cibes. A normal probably 67.81 78.51 69.79 84.78 79.63 85.01 101.42 99.05- 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 s (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.) A. One can be confident that the mean travel tax for all cities is between $ and $ OB. The travel tax is between $ and $ for % of all cities OC. There is a % probability that the mean travel tax for all cities is between 5 and 5 OD. One can be % confident that the all cities have a travel tax between Sand S (c) What would you recommend to a researcher who wants to increase the precision of the interval, but does not have access t additional data? OA. The researcher could increase the level of confidence. OB. The researcher could decrease the level of confidence. OC. The researcher could decrease the sample standard deviation D. The researcher could increase the sample mean
The accompanying data represent the total travel tax (in dollars) for a 3-day business trip in 8 randomly selected cibes. A normal probably 67.81 78.51 69.79 84.78 79.63 85.01 101.42 99.05- 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 s (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.) A. One can be confident that the mean travel tax for all cities is between $ and $ OB. The travel tax is between $ and $ for % of all cities OC. There is a % probability that the mean travel tax for all cities is between 5 and 5 OD. One can be % confident that the all cities have a travel tax between Sand S (c) What would you recommend to a researcher who wants to increase the precision of the interval, but does not have access t additional data? OA. The researcher could increase the level of confidence. OB. The researcher could decrease the level of confidence. OC. The researcher could decrease the sample standard deviation D. The researcher could increase the sample mean
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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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.
67.81
69.79
78.51
84.78 79.63
101.42
85.01
99.05
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.)
and S
O A. One can be
OB. The travel tax is between S
OC. There is a
% confident that the mean travel tax for all cities is between $
% of all cities.
for
and S
% probability that the mean travel tax for all cities is between
and S
and $
OD. One can be
% confident that the all cities have a travel tax between $
(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?
OA. The researcher could increase the level of confidence,
OB. The researcher could decrease the level of confidence.
O C. The researcher could decrease the sample standard deviation.
D. The researcher could increase the sample mean.
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