# statistics

posted by .

a coin is tossed 16 times. What is the standard deviation?

• statistics -

standard deviation = √npq = √(16 * .5 * .5) = ?

Note: p = .5, q = 1 - p (which is .5).

I'll let you do the calculations.

## Similar Questions

1. ### statistics

Suppose that a coin is tossed 100 times. Let X be the number of times that it shows heads. Find the mean and standard deviation of X.
2. ### statistics

find the probability of by taking a coin tossed 50 times
3. ### Statistics

A coin is tossed 10 times. What is the probability that the third head will apear on the tenth toss?
4. ### statistics

air coin is flipped 20 times. a. Determine the probability that the coin comes up tails exactly 15 times. b. Find the probability that the coin comes up tails at least 15 times. c. Find the mean and standard deviation for the random …
5. ### Math (statistics)

The probability of obtaining heads on a biased coin is 0.4. The coin is tossed 600 times. a. i. Write down the mean number of heads (240) ii. Find the standard deviation of the number of heads (12) b. Find the probability that the …
6. ### STATISTICS

A coin is tossed 3 times and let X be the number of heads appearing. The probability that 1 head will appear iS?
7. ### Statistics

Suppose a fair coin is tossed five times and let x be the number that turned up in those five times. **the mean and the standard deviation are respectively... a.) 0.5, 0.5 b.) 2.5, 0.5 c.) 2.5, 2.24 d.) 2.5, 1.12 **find P(x≥1) …
8. ### statistics

A coin is biased so that the probability of obtaining a head is 2/3. The coin is tossed four times. Find the probability of obtaining exactly two heads.
9. ### college- practical statistics

Five coins are tossed 3200 times find the frequencies of distribution of heads & tails & tabulate the results. Calculate the mean number of success & the standard deviation.
10. ### statistics

An unfair coin has a probability of coming up heads of 0.55 the coin is tossed 4 times. What is the probability that it lands heads at least once?

More Similar Questions