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A balanced coin is flipped 400 times. Determine the number <math>x</math> such that the probability that the number of heads is between <math>200- x</math> and <math>200 + x</math> is approximately .80. | A balanced coin is flipped 400 times. Determine the number <math>x</math> such that the probability that the number of heads is between <math>200- x</math> and <math>200 + x</math> is approximately .80. | ||
<ul class="mw-excansopts"> | |||
<li>7</li> | |||
<li>9</li> | |||
<li>11</li> | |||
<li>13</li> | |||
<li>15</li> | |||
</ul> | |||
'''References''' | '''References''' | ||
{{cite web |url=https://math.dartmouth.edu/~prob/prob/prob.pdf |title=Grinstead and Snell’s Introduction to Probability |last=Doyle |first=Peter G.|date=2006 |access-date=June 6, 2024}} | {{cite web |url=https://math.dartmouth.edu/~prob/prob/prob.pdf |title=Grinstead and Snell’s Introduction to Probability |last=Doyle |first=Peter G.|date=2006 |access-date=June 6, 2024}} | ||
Latest revision as of 16:41, 27 June 2024
A balanced coin is flipped 400 times. Determine the number [math]x[/math] such that the probability that the number of heads is between [math]200- x[/math] and [math]200 + x[/math] is approximately .80.
- 7
- 9
- 11
- 13
- 15
References
Doyle, Peter G. (2006). "Grinstead and Snell's Introduction to Probability" (PDF). Retrieved June 6, 2024.