Question

Smartphones: A poll agency reports that 32% of teenagers aged 12-17 own smartphones. A random sample of 100 teenagers is drawn. Round your answers to at least four decimal places as needed. (f) Would it be unusual if less than 22% of the sampled teenagers owned smartphones? It (WOULD/WOULDNT) be unusual if less than 22% of the sampled teenagers owned smartphones, since the probability is?

Answer 1

f) P(p < 0.22)

= P(z < -2.14)

= 0.0160

Hence,

It Would be unusual if less than 22% of the sampled teenagers owned smartphones, since the probability is 0.0160 which is less than 0.05