Asked by veedu

if the probability of a newborn child being female is 0.5, find the probability that in 100 births, 55 or more will be female.use the normal distribution to approximate the binomial distribution

Answers

Answered by MathGuru
Mean = np = 100 * 0.5 = ?
Standard deviation = √npq = √(100 * 0.5 * 0.5) = ?
Note: q = 1 - p

Finish the calculations, then use z-scores.

z = (x - mean)/sd

Note: x = 55

Determine the probability using the z-score and a z-table.

I hope this will help get you started.
Answered by drew
.1841
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