Smartphones: A poll agency reports that 47% of teenagers aged 12-17 own smartphones. A random sample of 147 teenagers is

[answerhappygod]

Smartphones A Poll Agency Reports That 47 Of Teenagers Aged 12 17 Own Smartphones A Random Sample Of 147 Teenagers Is 1 (34.77 KiB) Viewed 18 times

Smartphones: A poll agency reports that 47% of teenagers aged 12-17 own smartphones. A random sample of 147 teenagers is drawn. Round your answers to at least four decimal places as needed. Part: 0 / 6 Part 1 of 6 (a) Find the mean . The mean is 0.47 Р Part: 1/6 Part 2 of 6 (b) Find the standard deviation o^. P The standard deviation o is Esp

Part 3 of 6 (c) Find the probability that more than 50% of the sampled teenagers own a smartphone. The probability that more than 50% of the sampled teenagers own a smartphone is 0 Part: 3 / 6 Part 4 of 6 . (d) Find the probability that the proportion of the sampled teenagers who own a smartphone is between 0.44 and 0.55. The probability that the proportion of the sampled teenagers who own a smartphone is between 0.44 and 0.55 is Esp

Part 5 of 6 (e) Find the probability that less than 55% of sampled teenagers own smartphones. The probability that less than 55% of sampled teenagers own smartphones is Part: 5 / 6 Part 6 of 6 (f) Would it be unusual if less than 38% of the sampled teenagers owned smartphones? It (Choose one) ▼ be unusual if less than 38% of the sampled teenagers owned smartphones, since would th would not