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Ivahew [28]
4 years ago
5

A psychological study found that men who were distance runners lived, on average, five years longer than those who were not dist

ance runners. The study was conducted using a random sample of 50 men who were distance runners and an independent random sample of 30 men who were not distance runners. The men who were distance runners lived to be 84.2 years old, on average, with a standard deviation of 10.2 years. The men who were not distance runners lived to be 79.2 years old, on average, with a standard deviation of 6.8 years.
What is the test statistic for the appropriate test to determine if men who are distance runners live significantly longer, on average, than men who are not distance runners?
Mathematics
1 answer:
elena-s [515]4 years ago
8 0

Answer: C

Step-by-step explanation:

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Mike is three times as old as his little sister, Mary. In 4 years, he will be twice as old as Mary. How old is Mary?
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