government organization is examining the effectiveness of a program intended rogram to pass through security at a certain international airport. The accompanying data contain the results. Complete parts a through c below. shorten security lines at airports for "trusted travelers". For comparison purposes, a sample was obtained of the time in seconds it took passeng Click the icon to view the security time data. Calculate the sample mean and the sample standard deviation for this sample of passenger times. The sample mean is seconds. Round to two decimal places as needed.) The sample standard deviation is seconds. Round to two decimal places as needed.) . Assume that the distribution of time required to pass through security at this airport is normally distributed. Use the sample data construct a 95% confidence interval estimate for the average time required to pass through s The 95% confidence interval is seconds- - seconds. Security Time Data Round to two decimal places as needed.) E. What is the margin of error for the confidence interval constructed in part b? e = + seconds 369 222 148 164 (Round to two decimal places as needed.) 107 330
government organization is examining the effectiveness of a program intended rogram to pass through security at a certain international airport. The accompanying data contain the results. Complete parts a through c below. shorten security lines at airports for "trusted travelers". For comparison purposes, a sample was obtained of the time in seconds it took passeng Click the icon to view the security time data. Calculate the sample mean and the sample standard deviation for this sample of passenger times. The sample mean is seconds. Round to two decimal places as needed.) The sample standard deviation is seconds. Round to two decimal places as needed.) . Assume that the distribution of time required to pass through security at this airport is normally distributed. Use the sample data construct a 95% confidence interval estimate for the average time required to pass through s The 95% confidence interval is seconds- - seconds. Security Time Data Round to two decimal places as needed.) E. What is the margin of error for the confidence interval constructed in part b? e = + seconds 369 222 148 164 (Round to two decimal places as needed.) 107 330
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:A government organization is examining the effectiveness of a program intended to shorten security lines at airports for "trusted travelers". For comparison purposes, a sample was obtained of the time in seconds it took passengers not on the
program to pass through security at a certain international airport. The accompanying data contain the results. Complete parts a through c below.
E Click the icon to view the security time data.
a. Calculate the sample mean and the sample standard deviation for this sample of passenger times.
The sample mean is seconds.
(Round to two decimal places as needed.)
The sample standard deviation is seconds.
(Round to two decimal places as needed.)
b. Assume that the distribution of time required to pass through security at this airport is normally distributed. Use the sample data to construct a 95% confidence interval estimate for the average time required to pass through security.
The 95% confidence interval is
seconds-
-seconds.
Security Time Data
(Round to two decimal places as needed.)
c. What is the margin of error for the confidence interval constructed in part b?
e = ±
seconds
369
222
148
164
(Round to two decimal places as needed.)
207
380
193
330
228
207
176
243
286
364
242
372
148
187
288
233
360
387
357
232
144
254
261
303
319
237
124
222
285
298
194
144
176
138
304
247
224
224
407
218
184
313
367
362
299
402
261
243
195
311
311
245
296
37
428
368
Enter your answer in each of the answer boxes.
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