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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 1GP

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7.2.27-E
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Refer to the accompanying data set of mean drive-through service times at dinner in seconds at two fast food restaurants. Construct a 99% confidence interval estimate of the mean drive-through service time for Restaurant X at dinner; then de
the same for Restaurant Y. Compare the results.
Click the icon to view the data on drive-through service times.
Construct a 99% confidence interval of the mean drive-through service times at dinner for Restaurant X.
sec<µ<
Restaurant Drive-Through Service Times
sec
(Round to one decimal place as needed.)
Service Times (seconds)
Restaurant X
RestaurantY
83
123
120
149
269
97
124
152
112
172
182
124
150
159
217
136
108
128
124
125
332
312
176
113
155
136
131
223
210
291
148
94
234
235
187
130
96
137
245
140
156
197
169
120
69
145
201
153
143
139
204
178
119
141
174
145
157
130
173
137
187
197
233
193
351
237
240
251
237
237
300
207
200
177
191
166
90
105
58
168
103
147
172
154
174
78
145
147
103
128
152
165
120
133
310
146
134
182
153
123
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1-Create the confidence interval for the mean Overall Grade for those with 78 or better on Chapter Reviews. 2-Create the confidence interval for the mean Overall Grade for those with 77 or lower on Chapter Reviews. 3What do the confidence intervals indicate about how Chapter Reviews effect Overall Grades?
Suppose that a safety group surveyed 800 drivers. Among those surveyed, 83% said that careless or aggressive driving was the biggest threat on the road, and 34% said that cell phone usage by other drivers was the driving behavior that annoyed them the most. Based on these data and assuming that the sample was a simple random sample, construct and interpret a 95% confidence interval estimate for the true proportion in the population of all drivers who are annoyed by cell phone users. The confidence interval estimate is ??––––––?? (Round to three decimal places as needed. Use ascending order.) Interpret the confidence interval estimate. A. There is a 0.95 probability that the population proportion of drivers who are annoyed by cell phone users is in the interval. B. There is 95% confidence that the population proportion of drivers who are annoyed by cell phone users is in the interval. C. There is a 0.95 probability that the sample proportion of drivers…

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