Question
A safety specialist was concerned about cars' speeds on a certain busy stretch of road. They randomly selected 20 cars and measured their speeds at
A safety specialist was concerned about cars' speeds on a certain busy stretch of road. They randomly selected 20 cars and measured their speeds at the same point on the road. Each car was from a different time period and day, so the specialist is willing to consider the sample as representative. The speeds in the sample were strongly skewed to the left with a sample mean of x-bar = 96.5km/hr. There were two suspected outliers. The safety specialist now wants to know if they can safely make inferences about the population from this sample. What would you tell them about the CLT conditions? (select all that apply)
A. The data is a random sample from the population of interest. | |
B. x > 30, with only a few outliers | |
C. x < 30, with no outliers | |
D. the data are perfectly normal, and symmetrical | |
E. One of the CLT conditions fails | |
F. Both of the CLT conditions fail |
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