Recent content by Troy1

You have been an amazing help. I will recommend your site to everyone who I think might possibly be interested. Thank you so much! I will be back someday when I can't solve a math problem and don't know where to turn!

Thank you. I think I see now how you arrived at that number. Actually I thought of another question. If the number we come up with is only 320 for the final month, perhaps because of low newspaper circulation or some other plausible explanation, we get a significant value. But is the number...

This is great. Finally I think I understand it. Thank you so much. One last question. I see some standard distribution table online, but how would I be able to look at one of them when setting up this problem and know what number exactly the z-score had to be to pass muster?

Thank you, I think I see it now. So 320 accidents would give a z score of -1.655, making it the threshold for being a significant result. This would be true even though in two of the twelve months under consideration from the past three years the number of accidents was lower than this (314...

Okay, I am still having trouble with this. For the mean, I get 346.25. For the standard deviation, I get 15.86. So if I use the formula provided, an I plug in the number 250 for the new monthly total of traffic accidents, then subtract the mean and divide by the standard deviation, I get...

I have a statistics problem that is probably not too difficult for someone who knows what they are doing, but I still need help with it. Here’s the scenario. There is a town with a highway built at the end of 2013. The mayor is concerned because of the number of traffic accidents on the...