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?

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Acertain type of lightbulb is advertised to have mean lifetime of 750 hours. a consumer advocacy gro...