subject
Mathematics, 03.12.2019 05:31 bullockarwen

Acertain type of lightbulb is advertised to have mean lifetime of 750 hours. a consumer advocacy group would like to check this claims and test: h0: the mean lifetime is the advertised 750 hours ha: the mean lifetime is less than the advertised 750 hours. the advocacy group chooses at random 40 lightbulbs and records their lifetimes. based on the data the group concludes that the mean lifetime is less than 750 hours and accuses the manufacturer of the lightbulbs in false advertising. what type of error is possible in this situation?

ansver
Answers: 2

Another question on Mathematics

question
Mathematics, 21.06.2019 16:00
Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry
Answers: 3
question
Mathematics, 21.06.2019 17:20
Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years
Answers: 2
question
Mathematics, 21.06.2019 19:00
Find the length of the diagonal of the rectangle. round your answer to the nearest tenth. || | | 8 m | | | | 11 m
Answers: 2
question
Mathematics, 21.06.2019 19:30
Which table shows a proportional relationship between miles traveled and gas used?
Answers: 2
You know the right answer?
Acertain type of lightbulb is advertised to have mean lifetime of 750 hours. a consumer advocacy gro...
Questions
question
Mathematics, 17.12.2020 06:40
question
Mathematics, 17.12.2020 06:40
Questions on the website: 13722360