Richard and his 5 best friends want to see how their 100m dash times compare to the other runners in their district. There are records of all 200 other runners' times so Richard can calculate the population standard deviation. Why would a t-test be better than a z-test in this scenario   Select one: 1. The population is <500 2. The sample standard deviation cannot be calculated 3. The sample size is <30

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Richard and his 5 best friends want to see how their 100m dash times compare to the other runners in their district. There are records of all 200 other runners' times so Richard can calculate the population standard deviation. Why would a t-test be better than a z-test in this scenario
 
Select one:
1. The population is <500
2. The sample standard deviation cannot be calculated
3. The sample size is <30
 

 

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