The following exercise is designed to be solved using technology such as calculators or computer spreadsheets.
If a fair coin is tossed 100 times, the probability that one gets at least 61 heads is given by the following.
This is the p-value if you toss 100 coins and get 61 heads. Use technology to calculate this number. Round your answer to three decimal places.
OK, young person! Here is your result:
0.5^100*∑[100! / ((61+n)!(39-n)!)], n=0 to 38 =0.0176001 x 100 =1.76001%
By the way, that is the accurate probability of getting at least 61 Heads in 100 coin flips.
+26387 The following exercise is designed to be solved using technology such as calculators or computer spreadsheets.
If a fair coin is tossed 100 times, the probability that one gets at least 61 heads is given by the following.
This is the p-value if you toss 100 coins and get 61 heads. Use technology to calculate this number. Round your answer to three decimal places.
With calculator texas instrument TI-89:
\(\begin{array}{|rcll|} \hline P(X\ge61) &=& 1 -\text{ binomcdf }(100,0.5,60) \\ &=& 1 - 0.98239989989 \\ &=& 0.01760010011 \\ &\approx& 0.018 \\ \hline \end{array} \)
With internet calculator: see link: http://stattrek.com/online-calculator/binomial.aspx
