On the fourth day of Statistics, my teacher gave to me….four calling birds. They weren’t calling birds until they each got a cell phone. Each of the birds randomly selected their phone service independently and got together for lunch (seeds, of course – they are all vegetarians.) The calling plan they selected stated that the number of minutes used by customers is normally distributed with a mean number of minutes as 100 minutes per month and a standard deviation of 10. Find the probability that a randomly selected calling bird would use more than 125 minutes a month.
Bonus: Find the probability that all four randomly selected calling birds would use more than 125 minutes a month. Hint: Do the first problem and then come back to this one.
DON’T FORGET TO INCLUDE YOUR NAME. It is really nice to see so many of you trying these problems every day. Keep up the good effort.
In order to receive ANY credit, you must show correct formula, substitution and final answer VERTICALLY.
You have posted your entire assignment.
Just in case there's a tutor here who knows this subject, you need to indicate what you don't understand about your assignment.
I need to know the formula to figure out how to plug in the information
This is too much,there is need for personal tutorial.
Its due by midnight though there is no guideline you can at least give me cause its for extra credit for a math class and I really need the extra help and the bonus is just extra I just need to answer the first problem please?
Like help to figure it out
http://davidmlane.com/hyperstat/z_table.html
(d) Interpret the results in the context of the real-life situation.
On average, about 1.41.4 out of 6 women would consider themselves baseball fans. The standard deviation is about 1.01.0 women, so in most samples of 6 women, the number of women who consider themselves baseball fans would differ from the mean by no more than 1.01.0.