Question: It is known that a certain laboratory task takes the average person 2.5 seconds. A developmental psychologist was interested in whether older people take longer

It is known that a certain laboratory task takes the average person 2.5 seconds. A developmental psychologist was interested in whether older people take longer to perform this task. The psychologist tested 30 randomly selected 80-year-olds. Their mean time was 2.7 seconds, with standard deviation of 1.4 seconds. Use the steps of hypothesis testing at .05 level of significance and critical t value of 1.699. What should the psychologist conclude?

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