Assume a binomial probability distribution with n=55 and π=0.34 . compute the following: (round all your z values to 2 decimal places.) the mean and standard deviation of the random variable. (round your "σ" to 4 decimal places and mean to 1 decimal place.) the probability that x is 22 or more. (use the rounded values found above. round your answer to 4 decimal places.) the probability that x is 14 or less. (use the rounded values found above. round your answer to 4 decimal places.)

0.8588

Step-by-step explanation:

Assume a binomial probability distribution with n = 40 and (symbol looks like a pie sign) = 0.55.  

Compute the following: (Round the value for standard deviation and intermediate calculations to 2 decimal places and your final answer to 4 decimal places.)  

The mean and standard deviation of the random variable.

mean = np = 40*0.55 = 22

std = sqrt(npq) = sqrt(22*0.45) = 3.1464

The probability that X is 25 or greater.

P(25<= x <= 40) = 1 - binomcdf(40,0.55,24) = 0.2142

The probability that X is between 15 and 25, inclusive.

P(15<= x <=25) = binomcdf(40,0.55,25)-binomcdf(40,0.55,14) = 0.8588

i think the answer is b

too hard the other guy did it

step-by-step explanation: