The commercial for the new Meat Man Barbecue claims that it takes 18 minutes for assembly. A consumer advocate thinks that the assembly time is higher than 18 minutes. The advocate surveyed 12 randomly selected people who purchased the Meat Man Barbecue and found that their average time was 21.1 minutes. The standard deviation for this survey group was 4 minutes. What can be concluded at the the αα = 0.05 level of significance level of significance?
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