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Would it be something like
3x + y = 785?
I looked up average speeds of planes and then divided into 785 miles. My first answer was 314mph.
a plane with a tailwind makes a 785-mile flight in 2.5 hours. The return flight against the wind takes half hour longer. What is the wind speed?
I got 3 completely different answers:
52 Mph
288 mph
314 mph
Which one is correct?
Thank you.
0.0228
I have no idea.
So the probabilty of the diameter in my pipe being over 0.44 inch is 97.72%
97.8% and above?
i thought I was getting this.
97.7%?
yes and if i change it to a precenage the answer would be 47.72%?
Yes so 2 deviations would be .1359?
Unfortunately I don't. I think I will drop the course before it begins.
I am looking at this and I can only guess that it's somewhere between 2.3% and the 15.9%
Hi bobby,
My computer is older and I can't open this link.
I have the Nature of Math 11th edition.
I can almost see what you are doing, but still really have no idea. I am done for when the spring semester starts.
thanks,
No I didn't. trying to get a handle on statistics before my class begins in about 2 weeks.
Thank you...
One more that I am really struggling with:
Diameter of a pipe is normally distributed with a mean of 0.4 inch and a variance of 0.0004. What is the probabilty that the diameter of a randomly selected pipe will exceed 0.44 inch.
The book that I bought I can't understand how to apply and use any of the formulas.
Hi Bobby,
Still trying to figure this out, but it is all greek to me.
Instant dinner comes in packages with weights that are normally distributed with a standard deviation of 0.3oz. If 2.3% of the dinners weigh more than 13.5oz, what is the mean weight?
For a class of 43 students, the mean grade is 67 and the standard deviation is 7, how many students, should receive a C?
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