Question

lydia runs an experiment to determine if a coin is fair by counting the number of times a coin lands heads up. the table shows her data. coin fairness test

number of coin flips	0	10	20	30	40	50	60	70	80	90
number of heads up	0	7	12	18	23	30	35	38	42	45

according to the line of best fit, about how many times would the coin land heads up in 100 flips? 48 50 51 53

Explanation:

Step1: Observe the trend

As the number of coin - flips increases, the proportion of heads seems to approach 0.5.

Step2: Calculate for 100 flips

For a fair coin, the expected number of heads in 100 flips is $100\times0.5 = 50$.

Answer:

50