Question
Gasoline prices increased substantially from 2018 to 2021. A research firm provided information on the mean cost per gallon for regular unleaded gasoline over the
Gasoline prices increased substantially from 2018 to 2021. A research firm provided information on the mean cost per gallon for regular unleaded gasoline over the 3 years, in Midwest.
Assume the following results were obtained from independent samples.
| 2021 Cost | 2018 Cost |
| Sample mean = $3.63 | Sample mean = $2.26 |
| S1 = $0.76 | S2 = $0.53 |
| n1 = 56 | n2 = 64 |
What is the 97% confidence interval estimate of the increase of the mean cost?
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Geometry, Structure And Randomness In Combinatorics
Authors: Ji?í Matousek, Jaroslav Nešet?il, Marco Pellegrini
1st Edition
887642525X, 9788876425257
