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Find the standard deviation of binomial random variables

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Reference no: EM132858358

Consider the following binomial random variables.

(a) The number of tails seen in 40 tosses of a quarter.

(i) Find the mean. (Give answer correct to one decimal place.)

(ii) Find the standard deviation. (Give answer correct to two decimal places.)

(b) The number of left-handed students in a classroom of 58 students (assume that 20% of the population is left-handed).

(i) Find the mean. (Give your correct to one decimal place.)

(ii) Find the standard deviation. (Give answer correct to two decimal places.)

(c) The number of cars found to have unsafe tires among the 426 cars stopped at a roadblock for inspection (assume that 13% of all cars have one or more unsafe tires).

(i) Find the mean. (Give answer correct to one decimal place.)

(ii) Find the standard deviation. (Give answer correct to two decimal places.)

(d) The number of melon seeds that germinate when a package of 57 seeds is planted (the package states that the probability of germination is 0.83.

(i) Find the mean. (Give answer correct to one decimal place.)

(ii) Find the standard deviation. (Give answer correct to two decimal places.)

Reference no: EM132858358

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