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.

Guest Mar 8, 2018

#1**0 **

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.

Guest Mar 8, 2018

edited by
Guest
Mar 8, 2018

#3**0 **

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

heureka
Mar 9, 2018