anonymous
  • anonymous
assume that 21-year-old men's heart rates at rest are normally distributed with a mean of 72 bpm and a standard deviation of 10 bpm. If 300 are examined, how many would you expect to have a heart rate of less than 77?
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
Its the integral of the gaussian function from -infinity to 77. You should use phi function(integral of normal gaussian) chart and also do some conversion. I don't remember the function and the conversion. But you can find them in wikipedia or some math tutorial site. that is a veri general question type. You can find many problems like this and see how to solve them.
anonymous
  • anonymous
http://www.wolframalpha.com/input/?i=1%2F2*erfc%28%2872-77%29%2F%2810*sqrt%282%29%29%29 Here is the calculation. The answer is 0.69 if i didn't solve it wrong
anonymous
  • anonymous
0.69 is the percentage. The number would be 300*0.69 = 207

Looking for something else?

Not the answer you are looking for? Search for more explanations.