etx

x

be a random variable that possesses a binomial distribution withp

=

0.9

p=0.9

andn

=

15

n=15

. Using the binomial formula or tables, calculate the following probabilities. Also calculate the mean and standard deviation of the distribution. Round solutions to four decimal places, if necessary.

P

(

x

3

)

=

P(x3)=

P

(

x

7

)

=

P(x7)=

P

(

x

=

9

)

=

P(x=9)=

=

=

=

=