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Hello All, I'm struggling with this homework. I've plugged it into the Z table and haven't gotten the answers... I got this far: 66-64/(0.5/sqrt20) =
Hello All, I'm struggling with this homework. I've plugged it into the Z table and haven't gotten the answers... I got this far: 66-64/(0.5/sqrt20) = 1.12. Z score = 0.0367 1.
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The average speed of all vehicles on a highway is = 64 mph with a standard deviation of = 5 mph. |
A random sample of 20 vehicles is clocked.What is the probability that the sample mean will exceed 66 mph? |
In the previous question what fraction of sample means from samples of n = 20 vehicles fall within 1 mph from the population mean speed? |
If you doubled the sample size in the previous question, what fraction of the sample means would fall within 1 mph from the population mean speed? |
In the previous question where n = 40, the middle interval which includes the 95% of the mean speed from samples of n = 40 vehicles is, |
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