The largest z-score available in most tables is 2.99, which corresponds to a probability of 99.86%. A fair coin is tossed 200 times.
a) What number of heads observedžwould correspond to a z-score of 2.99? [2]

The number of heads observed is 121.14 heads

Step-by-step explanation:

The formula for the z-score of a proportion is given as follows;

Where:

= Sample proportion

p = Population success proportion = 0.5

q = 1 - p = 1 - 0.5 = 0.5

n = Number in of observation = 200

z = 2.99

Hence, we have;

Therefore;

= 0.6057

∴ The number of heads observed = 200 × 0.6057 = 121.14 heads.

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step-by-step explanation:

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step-by-step explanation: