Question
3 The owner of a gasoline station wants to study gasoline purchasing habits by motorists at his station. He selects a random sample of 45
3 The owner of a gasoline station wants to study gasoline purchasing habits by motorists at his station. He selects a random sample of 45 motorists during a certain week, with the following results:
The amount purchased was XBar = 10.3 gallons, S = 3.3 gallons.
12 motorists purchased premium-grade gasoline.
1.At the 0.05 level of significance, is there evidence that the population mean purchase was different from 10 gallons?
2.At the 0.05 level of significance, is there evidence that fewer than 20% of all the motorists at the station purchased premium grade gasoline?
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started