Reference no: EM132155656

A Citizen Protection Group has warned the government about recurring poor air quality indicators due to the presence of Carbon Monoxide CO which is a colorless poisonous gas that is emitted directly from automobile.  Some years ago, a limit of 2.1 g/km on exhaust gas emissions was imposed. A recent data collection on a random set of 50 cars generated the following results:

Exhaust gas emission levels on 50 cars

1.9

1.24

1.24

1.59

2.98

2.98

0.08

0.83

2.19

2.16

2.39

1.49

1.03

2.14

1.98

2.07

1.91

1.92

1.87

2.13

2.89

2.97

2.02

1.73

1.87

0.51

1.7

2.20

1.85

0.67

2.69

2.03

2.17

1.60

2.45

2.04

1.36

1.9

2.04

1.88

2.32

2.49

1.20

1.55

1.23

1.99

1.62

1.48

2.17

2.09

If there enough evidence to conclude that more 25% of cars do not respect the limit of 2.1g/km? Use α = 0.05. What is the p-value and indicate your assumptions?